To Know About Fastener Basics And Its Classcifications

1.What is a fastener?

Fasteners are a class of mechanical parts widely used for fastening connections. A wide variety of fasteners can be seen on various machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, instruments and supplies. It is characterized by a wide variety of variety specifications, different performance uses, and standardized, serialized, universal species degree is also very high. Therefore, some people call the existing national standard class of fasteners as standard fasteners, or simply as standard parts.

2.Fastener’s classification

It usually includes the following 12 types of parts: bolts, studs, screws, nuts, tapping screws, wood screws, washers, stops, pins, rivets, assembly, and connection pair, welding rod.

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3.The main standard for fasteners

International Standard: ISO
National standard:
ANSI - United States
DIN - West Germany
BS - UK
JIS - Japan
AS - Australia

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4.Fastener material performance requirements

The mechanical properties of material include two aspects: mechanical properties of material and mechanical properties of fasteners.
Mechanical properties of the materials: On the one hand is the use performance of the material. On the other hand is the process performance.
Material according to the most common order is: carbon steel, stainless steel, stainless iron, copper, aluminum and so on. Carbon steel is also divided into low carbon steel (such as C1008 / C1010 / C1015 / C1018 / C1022), medium carbon steel (such as C1035), high carbon steel (C1045 / C1050), alloy steel (SCM435 / 10B21 / 40Cr). General C1008 materials are ordinary grade products, such as 4.8 screws, ordinary grade nuts; C1015 with ring screws; C1018 with machine screws, including self-tapping screws; C1022 is generally used for self-tapping screws; C1035 with 8.8 screws; C1045 / 10B21 / 40Cr with 10.9 screws; 40Cr / SCM435 with 12.9 screws. Stainless steel has SS302 / SS304 / SS316 as the most common. Of course, now also popular a large number of SS201 products, or even lower nickel content products, we call non-authentic stainless steel products; the appearance looks like stainless steel, but the anti-corrosion performance is much different.

5.Surface preparation

Surface treatment is the process of forming a cover layer in the workpiece by certain methods, its purpose is to give the product surface beautiful, corrosion prevention effect, the surface treatment method: electroplating, hot dip galvanizing, mechanical plating, etc.

Founded in 1999, it is a professional fastener manufacturing and sales limited company. At present, there are two major production bases in Tianjin and Ningbo, with a production capacity of 1,000 tons / month.
Main products are carbon steel, alloy steel bolts, nuts, stainless steel bolts, screw. Covering various standards, among which screws such as hex self tapping screw and Hex head wood screw with EPDM washer are one of the most competitive products of our company.


Post time: Aug-19-2022