What is a fastener

What is a fastener?

Fastener is an important hardware device, which is used in many engineering related applications to mechanically connect or fix two or more objects together. They are considered as alternatives to welding.

In the manufacturing of machines, fasteners are used to hold two parts together. Fasteners can also be divided into three categories: permanent fasteners, temporary fasteners and semi-permanent fasteners.

Characteristics of fasteners

Fasteners are mechanical devices that hold two or more parts together. They can be assembled and disassembled at will, allowing for easy removal of the parts without damaging them. Fasteners are generally small in size, light in weight and easy to mass produce. This allows manufacturers to use large quantities of fasteners on a single assembly line with minimal labor costs compared to other types of fastener systems. Additionally, their ease of use means they require little maintenance and therefore have low operating costs over time compared with other systems such as rivets or bolts which require frequent maintenance due to their complexity.”

Materials of Fasteners

There are three main types of steel fasteners used in industry: stainless steel, carbon steel and alloy steel. Main grades of stainless steel fasteners: 200 series, 300 series and 400 series. Titanium, aluminum and various alloys are also common structural materials of metal fasteners. In many cases, special coatings or coatings can be applied to metal fasteners to improve their performance characteristics, such as enhancing corrosion resistance. Common coatings / coatings include zinc, chromium and hot dip galvanizing.

Carbon steel

Carbon steel is a series of carbon and iron alloys, containing up to about 1% carbon and up to 1.65% manganese, and adding a specific amount of deoxidizing elements and residues of other elements.

Low alloy steel

Low alloy steel is a kind of metal mixture composed of steel and other metals, which has ideal properties. Low alloy steel contains about 1% – 5% alloy elements. Therefore, it has precise chemical composition, provides better mechanical properties and aims to prevent corrosion.

Stainless steel

Stainless steel is a general term of the corrosion-resistant alloy steel family containing 10.5% or more chromium. All stainless steels have high corrosion resistance. This resistance to attack is due to the formation of a natural chromium rich oxide film on the surface of the steel.

Brass

Brass is a copper-based alloy with the main addition being zinc.

Aluminum

Aluminum is a silvery white metal and the 13th element in the periodic table. A surprising fact about aluminum is that it is the most widely distributed metal on earth, accounting for more than 8% of the mass of the earth’s core. It is also the third most common chemical element on our planet after oxygen and silicon.

Copper

Copper is a chemical element with the symbol Cu (from Latin: cuprum) and atomic number 29. It is a malleable metal with very high thermal conductivity and conductivity. Pure copper is soft and plastic; The newly exposed surface is orange red. It is used as a conductor of heat and electricity, building materials, and components of various metal alloys.
The title was provided by our writer.

Titanium

Titanium is a transition metal light with white silver metal color. It is strong, shiny and corrosion resistant. Pure titanium is insoluble in water, but soluble in concentrated acid. When exposed to high temperatures in the air, this metal forms a passive but protective oxide layer (resulting in corrosion resistance), but it can resist discoloration at room temperature.
The main oxidation state is 4⁺, although the states of 3⁺ and 2⁺ are also known, but they are not very stable. This element burns in air when it is heated to obtain dioxide TiO₂ and when it combines with halogen. It reduces water vapor to form carbon dioxide and hydrogen. It reacts in a similar way to hot concentrated acid, but it forms trichloride with chlorohydric acid. The metal absorbs hydrogen to obtain TiH₂ and forms nitride tin and carbide tic. Other known compounds are sulfur TiS₂, the lowest oxides Ti₂O₃ and TiO, and sulfur Ti₂S₃ and tis. Salts are known in all three oxidation states.

Nickel and its alloys

Nickel alloy is an alloy with nickel as the main element. There is complete solid solubility between nickel and copper. The wide solubility range between iron, chromium and nickel makes many alloy combinations possible.

All these materials can be found on a variety of fastener types including screws, rivets, bolts and nuts.  They are used in both structural applications as well as non-structural applications such as fastening accessories to furniture or electronic devices

Types of Fasteners

There are many types of fasteners. The following is a list of the most common:
1. Bolt: it is a fastener composed of head and cylinder, and the screw has external thread. It needs to be used with nuts to fasten and connect two parts with through holes. Bolted connections are removable connections.
2. Stud: it is a fastener without head, and only two ends have external threads. When connecting, one end must be screwed into the part with internal thread hole, the other end must pass through the part with through hole, and then screw on the nut, even if the two parts are closely connected as a whole. Stud connection is also a detachable connection.
3. Screw: it is also a fastener composed of head and screw.
According to the purpose, it can be divided into three categories: mechanical screw, fixed screw and special purpose screw.

• 1) Mechanical screw: mainly used for fastening connection between parts with fixed threaded holes and parts with through holes.
• 2) Fixing screw: mainly used to fix the relative position between two parts.
• 3) Special purpose screws: for example, there are eyebolts for lifting parts.

4. Nut: it has internal thread hole shape, generally flat hexagonal column shape, flat square column shape or flat cylindrical shape. It is used in conjunction with bolts, studs or machine screws to fasten and connect two parts into a whole.
According to its special category, it is divided into two categories: high-strength self-locking nut and nylon self-locking nut.

• 1) High strength self-locking nut: high strength and good reliability. It is used for road construction machinery, mining machinery, vibration machinery and equipment. It is European technology and less domestic production.
• 2) Nylon self-locking nut. It is a new type of high seismic and anti loosening fastener, which can be used in various electromechanical products with a temperature of – 50100 ℃. The demand for nylon self-locking nuts in aerospace, aviation, tanks, mining machinery, automobile transportation machinery, agricultural machinery, textile machinery, electrical products and all kinds of machinery has increased sharply, which can prevent major accidents caused by loose fasteners.

5. Self tapping screw: similar to machine screw, but the thread on the screw is the special thread of self tapping screw. It is used to fasten and connect two thin metal components as a whole. This connection is also a detachable connection.
6. Wood screw: it is also similar to machine screw, but the thread on the screw is the special thread of wood screw, which can be directly screwed on wood parts or parts to connect metal or non-metal parts with through holes with wood screws. These parts are fixed together. This connection is also a removable connection.
7. The shape of the washer is a fastener ring. It is placed between the support surface of the bolt, screw or nut and the surface of the connector, which increases the contact surface area of the connector, reduces the pressure per unit area, and protects the surface of the connector from damage. Another elastic washer can also play such a role. It has the function of preventing the nut from loosening.
8. Retaining ring: installed in the shaft groove or hole groove of machinery and equipment to prevent the left and right movement of parts on the shaft or hole.
9. Pin: it is mainly used for the positioning of parts, and some are also used for the connection of parts, fixing parts, transmitting power or locking other fasteners.
10. Rivet: it is a fastener composed of head and handle. It is used to fasten and connect two parts or components with through holes to make them a whole. This connection form is called rivet connection, or riveting for short. It is an inseparable connection.
11. Assembly and connection sub assembly: refers to a combination of supplied fasteners, such as some machine screws or bolts, self provided screws, flat washers or spring washers, and lock washers are supplied in combination. Connecting pair: refers to a fastener supplied by a combination of special bolts, nuts and washers, such as high-strength hexagon head bolt connecting pair for steel structure.
12. Welding nail: it is a heterogeneous fastener composed of light energy and nail head or no nail head, which is fixedly connected to a part or component by welding for connection with other parts.
13. Steel wire screw sleeve: it is a new type of threaded connection element, which is refined from high-strength and high-precision corrosion-resistant diamond wire. Shaped like a spring, it is installed in a specific screw hole of the matrix, and its inner surface forms a standard thread. Matching with the screw bolt can significantly improve the strength and wear resistance of the threaded connection; Especially in aluminum, magnesium, cast iron, plastics and other low-strength materials. The locking type is to add one or more locking rings on the basis of the ordinary type.

Standard of fasteners

The following table is provided for guidance only as there are often dimensional variations between standards.

DIN Standard	ISO Standard	British Standard	Product
DIN 1	ISO 2339		Cone Pins, untempered
DIN 125	ISO 7089		Washers; medium type, primarily for hexagon bolts
DIN 125	ISO 7090		Washers; medium type, primarily for hexagon bolts
DIN 126	ISO 7091		Product grade C washers – designed for use with Hexagon Head Bolts and Nut
DIN 127		BS4464B	Spring Lock Washers with square ends or tang ends
DIN 128			Curved and wave Spring Lock Washers
DIN 137			Spring Washers, curved or wave
DIN 1440	ISO 8738		Medium type washers for pins
DIN 1443	ISO 2340		Clevis Pins without head
DIN 1444	ISO 2341		Clevis Pins with head
DIN 1470	ISO 8739		Grooved Pins, full length parallel-grooved with pilot
DIN 1471	ISO 8744		Grooved Pins, full length taper-grooved
DIN 1472	ISO 8745		Grooved Pins, half length taper-grooved
DIN 1473	ISO 8740		Grooved Pins, full length parallel-grooved with chamfer
DIN 1474	ISO 8741		Grooved Pins, half length reverse-grooved
DIN 1475	ISO 8742		Grooved Pins, third length centre-grooved
DIN 1476	ISO 8746		Round Head Grooved Pins
DIN 1477	ISO 8747		Countersunk Head Grooved Pins
DIN 1481	ISO 8752		Spring-type Straight Pins (roll pins) – heavy type
DIN 1587			Hexagon Domed Cap Nuts
DIN 1816			Round Nut with set pin holes inside; ISO metric fine thread
DIN 315			Wing Nuts with rounded wings
DIN 316			Wing Screws with rounded wings
DIN 404			Slotted Capstan Screws
DIN 417	ISO 7435		Slotted Set Screws with long dog point
DIN 427	ISO 2342		Slotted Headless Screws with chamfered end
DIN 428	ISO 4034		Hexagon Nuts, Grade C
DIN 433	ISO 7092		Washers for use with cheese head screws
DIN 433-1	ISO 7092		Product grade A washers – with a hardness up to 250 HV designed for use with cheese head screws
DIN 433-2	ISO 7092		Product grade A washers – with a hardness up to 300 HV designed for use with cheese head screws
DIN 438	ISO 7436		Slotted Set Screws with cup point
DIN 439	ISO 4035	BS3692	Hexagon Thin Nuts
DIN 439	ISO 4036	BS3692	Hexagon Thin Nuts
DIN 439	ISO 8675	BS3692	Hexagon Thin Nuts
DIN 439-1	ISO 4036		Unchamfered Hexagon Thin Nuts – product grade B
DIN 439-2	ISO 4035		Chamfered Hexagon Thin Nuts – product grades A and B
DIN 439-2	ISO 8675		Chamfered Hexagon Thin Nuts – product grades A and B
DIN 440	ISO 7094		Washers for use in timber constructions
DIN 444			Eyebolts
DIN 462			Machine tools; internal tab washers for slotted round nuts for hook spanner according to DIN 1804
DIN 464			Knurled Thumb Screws, high type
DIN 466			Knurled Nuts, high type
DIN 467			Knurled Nuts, low type
DIN 471			Circlips (retaining rings) for shafts; normal type and heavy type
DIN 479			Square Head Bolts with short dog point
DIN 5406			Lock Washers and locking plates for use with rolling bearings
DIN 548			Round Nuts with set pin holes inside
DIN 551	ISO 4766		Slotted Set Screws with flat point
DIN 553	ISO 7434		Slotted Set Screws with cone point
DIN 555	ISO 4034		M5 to M100x6 Hexagon Nuts – product grade C
DIN 558	ISO 4018		Hexagon Head Screws
DIN 580			Collar Eyebolts for lifting purposes
DIN 601	ISO 4016		M5 to M52 Hexagon Head Bolts; product grade C
DIN 603			Mushroom Head Square Neck Bolts
DIN 609			Hexagon Fits Bolts with long thread
DIN 6319			Spherical Washers and conical seats
DIN 6325	ISO 8734		Parallel Pins, hardened: tolerance zone m6
DIN 6340			Washers for clamping devices
DIN 653			Knurled Thumb Screws, low type
DIN 6797			Toothed Lock Washers
DIN 6798			Serrated Lock Washers
DIN 6799			Lock Washers (retaining washers) for shafts
DIN 6900	ISO 10644		Screw and Washer assemblies
DIN 6901	ISO 10510		Tapping Screw and Washer assemblies
DIN 6902	ISO 10673		Plain Washers for screw and washer assemblies
DIN 6903	ISO 10669		Plain Washers for tapping screw and washer assemblies
DIN 6912			Hexagon Socket Thin Head Cap Screws with pilot recess
DIN 6914	ISO 14399-4		High-strength Hexagon Head Bolts with large widths across flats for structural steel bolting
DIN 6916			Round Washers for high-strength structural steel bolting
DIN 6921	ISO 1665		Hexagon Flange Bolts
DIN 6922	ISO 1665		Hexagon Flange Bolts with reduced shank
DIN 6923	ISO 1661		Hexagon Nuts with flange
DIN 6924	ISO 7040		Prevailing torque type Hexagon Nuts with non-metallic insert
DIN 6924	ISO 10512		Prevailing torque type Hexagon Nuts with non-metallic insert
DIN 6925	ISO 7042		Prevailing torque type all-metal Hexagon Nuts
DIN 6925	ISO 10513		Prevailing torque type all-metal Hexagon Nuts
DIN 6926	ISO 7043		Prevailing torque type Hexagon Nuts with flange and with non-metallic insert
DIN 6926	ISO 12125		Prevailing torque type Hexagon Nuts with flange and with non-metallic insert
DIN 6927	ISO 7044		Prevailing torque type All-Metal Nuts with flange
DIN 6927	ISO 12126		Prevailing torque type All-Metal Nuts with flange
DIN 7045			Pan Head Screws with type H or type Z cross recess – product grade A
DIN 7337	ISO 14589		Break mandrel Bblind Rivets
DIN 7337	ISO 15977 to ISO 15984		Break mandrel Blind Rivets
DIN 7337	ISO 16582 to ISO 16584		Break mandrel Blind Rivets
DIN 7343	ISO 8750		Spiral Pins; normal type
DIN 7344	ISO 8748		Spiral Pins; heavy duty type
DIN 7346	ISO 13337		Spring-type Straight Pins; (roll pins) lightweight type
DIN 7349			Plain Washers for Bolts with heavy clamping sleeves
DIN 7500-1	ISO 7085		Thread rolling Screws for metric ISO thread – Part 1: Types, designation, requirements
DIN 7500-2			Thread rolling Screws for ISO metric thread; guideline values for hole diameters
DIN 7504			Self-drilling Screws with tapping screw thread – dimensions, requirements and testing
DIN 7513			Hexagon Head and slotted head thread cutting screws – dimensions, requirements and testing
DIN 7516			Cross recessed head thread cutting screws – dimensions, requirements and testing
DIN 7603			Ring Seals and Gaskets
DIN 7970	ISO 1478		Threads and thread ends for tapping screws (modified version of ISO 1478)
DIN 7971	ISO 1481	BS4174	Slotted Pan Head Tapping Screws
DIN 7972	ISO 1482		Slotted Countersunk Head Tapping Screws
DIN 7973	ISO 1483		Slotted Raised Countersunk Head Tapping Screws
DIN 7977	ISO 8737		Taper Pins with thread ends and constant point lengths
DIN 7978	ISO 8736		Taper Pins with internal thread
DIN 7979	ISO 8733		Parallel Pins with internal thread
DIN 7979	ISO 8735		Parallel Pins with internal thread
DIN 7980		BS4464A	Spring Lock Washers with square ends for cheese head screws
DIN 7981	ISO 7049		Cross Recessed Pan Head Tapping Screws
DIN 7982	ISO 7050		Cross Recessed Countersunk Head Tapping Screws
DIN 7983	ISO 7051		Countersunk (flat) Head Tapping Screws with cross recess
DIN 7984			Hexagon Socket Thin Head Cap Screws
DIN 7985	ISO 7045	BS4183	Cross recessed raised Phillips Pan Head Screws
DIN 7989-1			Washers for steel structures – product grade C
DIN 7989-2			Washers for steel structures – product grade A
DIN 7991	ISO 10642	BS4168	Hexagon Socket Countersunk Head Cap Screws
DIN 84	ISO 1207	BS4183	Product grade A Slotted Cheese Head Screws
DIN 85	ISO 1580	BS4183	Product grade A Slotted Pan Head Screws
DIN 9021	ISO 7093		Plain Washers with large outside diameter
DIN 908			Hexagon Socket Screw Plugs with parallel screw thread
DIN 910			Hexagon-duty hexagon Head Screw Plugs
DIN 911	ISO 2936		Hexagon Socket Screw Keys
DIN 912	ISO 4762	BS4168	Hexagon Socket Head Cap Screws (modified version of ISO 4762)
DIN 912	ISO 21268	BS4168	Hexagon Socket Head Cap Screws (modified version of ISO 4762)
DIN 913	ISO 4026		Hexagon Socket Set Screws with flat point (ISO 4026 modified)
DIN 914	ISO 4027		Hexagon Socket Set Screws with cone point (ISO 4029 modified)
DIN 915	ISO 4028		Hexagon Socket Set Screws with full dog point
DIN 916	ISO 4029		Hexagon Socket Set Screws with cup point (ISO 4029 modified)
DIN 918-3			Overview of European standards for fasteners
DIN 921			Slotted Pan Head Screws with large head
DIN 923			Slotted Pan Head Screws with shoulder
DIN 929			Hexagon Weld Nuts
DIN 93			Tab Washers with long tab
DIN 930			Fine thread pitch partially Threaded Screws
DIN 931-1	ISO 4014	BS3692	M1,6 to M39 Hexagon Cap Screws partially threaded – product grades A and B
DIN 931-2	ISO 4014	BS3692	M42 to M160x6 Hexagon Cap Screws partially threaded – product grade B
DIN 933	ISO 4017	BS3692	M1,6 to M52 Hexagon Cap Screws fully threaded – product grades 8.8
DIN 934	ISO 4032		Hexagon Nuts with metric coarse and fine pitch thread – product classes A and B
DIN 934	ISO 8673		Hexagon Nuts with metric coarse and fine pitch thread – product classes A and B
DIN 935-1			Hexagon Slotted Nuts and Castle Nuts with metric coarse and fine pitch thread – product grades A and B
DIN 935-2			M42 to M160x6 Hexagon Head Bolts; product grade B
DIN 935-3			Hexagon Slotted Nuts with metric coarse pitch thread – product grade C
DIN 936		BS3692	M8 to M52 and M8x1 to M52x3 hexagon thin nuts; product grades A and B
DIN 937			Hexagon Thin Castle Nuts
DIN 938			Studs with a length of engagement equal to about 1 d
DIN 939			Studs with a length of engagement equal to about 1,25 d
DIN 94	ISO 1234		Split Pins
DIN 95			Slotted Raised Countersunk (oval) Head Wood Screws
DIN 96			Slotted Round Head Wood Screws
DIN 960	ISO 8765		M8x1 to M100x4 Hexagon Head Bolts with fine pitch thread – product grades A and B
DIN 960	ISO 8676		M8x1 to M100x4 Hexagon Head Bolts with fine pitch thread – product grades A and B
DIN 961	ISO 8676		M8x1 to M52x3 Hexagon Head Bolts with fine pitch thread – product grades A and B
DIN 962			Designation system for fasteners
DIN 963	ISO 2009	BS3692	Slotted Countersunk Head Screws (with countersunk heads as specified in ISO 2009-1972)
DIN 964	ISO 2010	BS3692	Slotted Raised Countersunk Oval Head Screws
DIN 965	ISO 7046	BS3692	Cross Recessed Countersunk Flat Head Screws
DIN 966	ISO 7047		Cross Recessed Raised Countersunk Head Screws
DIN 970	ISO 4032		Hexagon Nuts; style 1; metric coarse thread, product grades A and B; ISO 4032 modified
DIN 971-1	ISO 8673		Style 1 Hexagon Nuts with metric fine pitch thread; property classes 6 and 8
DIN 971-2	ISO 8674		Style 2 Hexagon Nuts with metric fine pitch thread; property classes 10 and 12
DIN 972	ISO 4034		M5 to M39 Hexagon Nuts; style 1; product grade C (modified version of ISO 4034)
DIN 975			Threaded Rods
DIN 976-1			Metric thread Stud Bolts
DIN 976-2			Metric interference-fit thread Stud Bolts
DIN 977	ISO 21670		Hexagon Weld Nuts with flange
DIN 979			Hexagon Thin Slotted Nuts and Castle Nuts with metric coarse and fine pitch thread – Product grades A and B
DIN 980	ISO 7042		All-metal prevailing torque type Hexagon Nuts
DIN 980	ISO 10513		All-metal prevailing torque type Hexagon Nuts
DIN 981			Locknuts for use with rolling bearings
DIN 982	ISO 7040		Prevailing torque type Hexagon Nuts with non-metallic insert
DIN 982	ISO 10512		Prevailing torque type Hexagon Nuts with non-metallic insert
DIN 983			Retaining Rings with lugs for use on shafts (external circlips)
DIN 985	ISO 10511		Prevailing torque type Hexagon Thin Nuts with non-metallic insert
DIN 986			Prevailing torque type Hexagon Domed Cap Nuts with non-metallic insert
DIN 988			Shim Rings and supporting rings

Uses of Fasteners

Fasteners are used in applications where holding power is required.Fasteners are mechanical units used to connect two or more objects. Fasteners can be used for permanent or temporary connections, depending on site conditions. There are many types of fasteners that have different applications and people should certainly know.
Fasteners can be divided into permanent or temporary units.
Examples of permanent fasteners can be rivets, nails, etc., which are disposable fasteners designed to permanently connect two objects. Therefore, these fasteners cannot be removed once installed, and removing it may cause damage to it. Temporary fasteners are designed to temporarily connect two or more objects and can be easily removed and reused.
Examples of temporary fasteners are bolts and screws, which are commonly used in some industries and products because they allow components to be reassembled when needed. Temporary fasteners are also called threaded or unthreaded.
From household appliances commonly used in our daily life to some high-tech gadgets, we all have a common component, that is fasteners. Although fasteners are not directly imagined by us, they will play an important role in our routine life. Whatever it is, from the tables and chairs we sit on to the cars we travel, because every edge we use is fixed in place by fasteners. Fasteners can be used in various industries, such as automobile, petrochemical, pharmaceutical, oil and natural gas, rubber, food processing, heavy machinery and so on.

Manufacturing process of fasteners

There are different types of fasteners. These include:

• 1. Coil element: Small billets are used as raw material, heated and rolled to make coiled elements, also known as wire or coil.
• 2. Annealing: A metal heat treatment process in which metal is slowly heated to a certain temperature for sufficient time, and then cooled at an appropriate rate (usually slow cooling, sometimes controlled cooling).
• 3. Pickling: A process of cleaning metal surface with acid solution to remove oxide layer and rust on metal surface.
• 4. Phosphating treatment: It is a process of forming phosphide chemical conversion film through chemical and electrochemical reaction. The function of phosphating film is to basically protect the metal, prevent the metal from corrosion, and prevent friction and lubrication at the same time. It belongs to surface treatment. Pretreatment.
• 5. Saponification: refers to the hydrolysis reaction process of oil products catalyzed by alkali. The function of saponification is to further increase the lubrication performance of metal surface, which also belongs to the pretreatment of surface treatment.
• 6. Stretch. The pretreated wire is extruded into the required shape (including appearance and material diameter) with a disc die with appropriate wire diameter.
• 7. Cold heading: a forging method in which a die is used to extrude a metal rod at room temperature. It is usually used to manufacture screws, bolts, rivets and nuts, which can reduce or replace cutting.
• 8. Turning: It is a kind of machining, which mainly uses turning equipment to turn the workpiece blank to obtain the ideal workpiece shape.
• 9. Thread processing (threading, rolling and tapping): Threads are obtained by extruding or cutting the material.
• 10. Heat treatment: the comprehensive process of heating, heat preservation and cooling the material in a certain medium, and controlling its performance by changing the surface or internal structure of the material.
• 11. Surface treatment. It refers to the process of artificially forming a surface layer with different mechanical, physical and chemical properties from the substrate on the surface of basic materials. Its purpose is to meet the requirements of corrosion resistance, wear resistance, decoration or other special functions of the product. We often hear hot-dip galvanizing, blue white zinc plating, bluing, blackening, etc. These are surface treatment processes.

Packing of fasteners

How to Pack Fasteners

Packaging fasteners is a delicate process that requires skill, caution and attention to detail.
It’s important to remember that packaging can be an extra expense for your company, so it’s important to accurately understand your needs. You don’t want to spend money on unnecessary packaging materials or services.
The best way to pack fasteners is to use a vacuum bag system. This method uses heat and pressure to seal the bags around your products to form a custom, airtight seal to protect them from damage during transportation. The bagging system also helps to protect the product from moisture so that it will not rust or corrode during storage.
You can also choose to use shrink wrapping machine to achieve this purpose. This machine seals the plastic on the edge of the product so that it will not be damaged by moisture entering the container during transportation or storage.
Packaging fasteners are a key part of any order fulfillment process. If you don’t know how to pack the fasteners correctly, you may eventually cause damage to the goods or even litigation.
In order to pack the fasteners correctly, you need to use bubble film and air bag to prevent them from shifting during transportation. You should also use packaging peanuts or other cushioning materials, such as paper or foam, to prevent items from rubbing against each other during transportation, which will cause damage over time. It is also important that your packaging materials be clean so that they do not get dirty during storage or transportation.
When you package fasteners in batches, make sure each has its own space so that they will not be damaged during transportation or storage.

Quality inspection of fasteners

How to check fasteners?

The first step in checking fasteners is to identify them properly. There are several different types of fasteners that have different characteristics, so it’s important not to confuse them with each other. After you’ve identified the type of fastener you’re working with, make sure it’s rated for high-quality use by checking its specifications sheet or contacting the manufacturer directly.
If you’re working with a new type of fastener for the first time (or if you want to get more information on how something works), there are plenty of online resources available to help you learn more about them before using them on any project.
When you’re inspecting fasteners, look for the following:

• 1. The heads of screws should be flat and smooth.
• 2. The threads on the bolts should be clean and even throughout their length.
• 3. The ends of all bolts should be smooth and free of burrs or cracks that could cause them to break off in use.

Surface inspection: This is the simplest, most common form of quality inspection. Inspectors will examine a fastener to check for defects, such as pitting or scratches, before it leaves the factory.

Dimensional inspection: This type of quality control involves measuring various dimensions to ensure that they fall within a small tolerance range. For example, if a bolt has been tightened too much during assembly, its diameter will be smaller than expected because it’s compressed from both sides and not just from one side like when you tighten a nut onto a bolt by hand.
Chemical analysis: A machine called an X-ray fluorescence analyzer can detect trace elements present in steel alloys at very low levels—this is useful for detecting impurities like lead or sulfur which would make your fastener less corrosion resistant and more likely to fail prematurely due to stress corrosion cracking (SCC) between two surfaces sharing an electrolyte-containing fluid interface (like salt water). Chemical analysis can also reveal other types of contaminants such as manganese content so we know whether our alloy contains too much manganese which makes it brittle when hardened rather than tough like chrome molybdenum steels should be used instead

Measurement of fasteners

When you’re measuring fasteners, there are a few factors to consider. You’ll need to know the length and diameter of each fastener before you can proceed with anything else. Once you have those numbers, though, it’s time to look at standards.
Many different types of fasteners exist and have been developed over time depending on what they’re being used for and what type of materials they’re going into or coming out of. For instance, if your project requires high-strength bolts that will resist corrosion from salt water exposure then perhaps these three grades would be ideal: Grade 8 (200 ksi), Grade 10 (350 ksi), Grade 12 (500 ksi). The higher the grade number is means greater tensile strength capabilities so these grades would provide much better protection against corrosion than lower grade options such as 5/16th inch flathead lag screws rated for 150 pounds per inch; use this only if no other option were available!

How to improve the quality of fasteners

When it comes to the quality of fasteners, there are many factors that affect the quality of a product.

• Supply chain management
• Process control
• Quality control
• Selection of raw materials
• Technological improvement
• Advanced equipment
• Staff training
• Customer feedback

Cost of fasteners

The cost of fasteners depends on the raw material and the labor cost. The exchange rate between USD and RMB affects the cost of fasteners.

How to Choose Industrial Fasteners

What should you be looking for in a fastener? Here are a few things to consider.

• 1. Strength.
• 2. Brittleness.
• 3. Corrosion resistance.
• 4. Electrical coupling corrosion performance.
• 5. Cost.

When selecting fasteners for industrial applications, a variety of factors and characteristics must be considered, including:

• The type of thread.
• The applied load on the fastener.
• The stiffness of the fastener.
• The number of fasteners required.
• Accessibility.
• Environmental factors (meaning temperature, water exposure and potential corrosion factors).
• Installation process.
• Material to be connected.
• Reusability.
• Weight limitations.

Fasteners can sometimes be supplied with coatings (e.g. cadmium plated, zinc plated, phosphate plated) to improve their corrosion resistance and general performance.

How to find reliable fastener manufacturers

To get the best fastener manufacturers, you’ll want to find out:

• The reliability of each manufacturer. To do this, ask for a certificate of quality and check the manufacturer’s website for information about its certification. You can find information on third-party inspections and payment terms there as well.
• The delivery time and after-sales service offered by each manufacturer.
• Whether or not a particular manufacturer offers warranty on its products or services (and what kind of warranty it is).

Place an order of fastener

• You can contact us by email or phone.
• You can also visit our factory.
• You need to tell us the size and quantity of fasteners you need.
• We will send you the quotation.
• You need to pay a deposit.

Source: China Fasteners Supplier: www.epowermetals.com

(Yaang Pipe Industry is a leading manufacturer and supplier of nickel alloy and stainless steel products, including Super Duplex Stainless Steel Flanges, Stainless Steel Flanges, Stainless Steel Pipe Fittings, Stainless Steel Pipe. Yaang products are widely used in Shipbuilding, Nuclear power, Marine engineering, Petroleum, Chemical, Mining, Sewage treatment, Natural gas and Pressure vessels and other industries.)

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