How Many Types of Fasteners? 9 Commonly Used Division Methods Are Here!

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– FASTENERA

Fasteners, also called standard parts, are a type of mechanical parts used for fastening and connection. As you know, there are thousands of different types of fasteners. Next, let's understand the classification of fasteners from various angles.

Materials

According to the different materials, fasteners can be divided into carbon steel fasteners, stainless steel fasteners, copper or iron or aluminum fasteners, and fasteners of other materials.

Shape of fasteners

According to the different shapes, it can be divided into hexagonal, cap-shaped, square, circular, tapered, butterfly, and other special-shaped fasteners.

Standards

According to the product standards stipulated by some countries, fasteners can be divided into German standard, American standard, British standard, Japanese standard, Italian standard, European standard, Australian standard, and international general standards, etc.

Use

According to the use of fasteners, it can be divided into fasteners for furniture, fasteners for vehicles, fasteners for machinery, fasteners for construction, fasteners for railways, fasteners for electric power, photovoltaic accessories, etc.

Thread

According to the different threads of fasteners, it can be divided into fine thread fasteners, coarse thread fasteners, standard pitch fasteners, reverse thread fasteners and so on.

Processing Technology

According to the different processing techniques of fasteners, they can be divided into hot-strike fasteners, stamping fasteners, cold-heading fasteners, casting fasteners, etc.

Surface treatment

According to the different surface treatment methods of fasteners, they can be divided into hot-dip galvanized fasteners, electro-galvanized fasteners, oxidation blackened fasteners, Dacromet fasteners, etc.

Strength

According to the strength of fasteners, they can be divided into high-strength fasteners and ordinary-strength fasteners. High-strength fasteners are generally grade 8.8 fasteners, grade 10.9 fasteners, and grade 12.9 fasteners. Normal strength fasteners generally refer to fasteners of grade 4.8 or grade 6.8.

Name

According to the name, fasteners are mainly divided into the following categories:

•Bolts

Bolt is a kind of fastener with external thread, which is used to fasten two parts with through holes. Commonly used bolts include DIN931 hex bolt, DIN933 hex bolt, DIN6921 hexagon head flange bolts, JIS1189 hexagon flange bolts, etc.

•Screws

Screws are one of the most widely used fasteners. Commonly used screws include drywall screws, self-drilling screws, chipboard screws, DIN912 socket head cap screws, DIN7991 socket head cap screws, etc.

•Studs

Studs generally refer to a type of fastener with external threads at both ends, including double-ended studs and fully threaded studs. Commonly used studs are oxidized blackened double-ended studs, and DIN975 fully threaded studs, etc.

•Nuts

Nuts are parts that are screwed together with bolts or screws for fastening. Commonly used nuts are DIN934 hexagon nuts, DIN980 lock nuts, DIN982 lock nuts, DIN985 lock nuts, DIN6923 hexagon flange nuts, etc.

•Washers

A washer is a part that is placed between the connected part and the nut. Commonly used washers include flat washers, spring washers, and DIN25201 double-disc self-locking washers, DIN128 spring washers, DIN6976 spring washers, DIN9250 double-sided tooth lock washers, NFE25-511 lock washers, etc.

•Expansion bolts

There are many kinds of expansion bolts, the common expansion bolts are 4pcs fix bolt, 3pcs fix bolt, 4pcs expansion shield fix bolt with eye bolt, hollow wall expansion anchor, wedge anchor, etc.

•Welding

Fasteners for welding, commonly used products are welding nuts, welding screws, welding studs, etc.

•Riveting

Fasteners for riveting, commonly used riveting fasteners include iron rivets, aluminum rivets, core pulling rivets, rivet nuts and so on.

•Rigging

Rigging refers to equipment used with ropes, such as shackle, turnbuckle, wire rope clip, etc.

Conclusion

Fasteners are widely used basic parts with a wide variety. Fasteners can be used in energy electronics, machinery manufacturing, petrochemical industry, instrumentation, construction industry, shipbuilding, bridge manufacturing and other fields. If you need to use fasteners, you need to know its material, length, diameter, surface treatment, strength and other aspects. For the safety of the project, we need to use fasteners that meet the requirements.