WEIDE
Automotive fasteners

Automotive fasteners

New energy fasteners

New energy fasteners

Locomotive fasteners

Locomotive fasteners

Non-standard customization

Non-standard customization

PRODUCTS

Specializing in R&D, production and sales of high-strength standard and non-standard fasteners

About Us

Weide Auto Parts Co., Ltd. (hereinafter referred to as the Company) was founded in 1983 with a registered capital of 50 million yuan, specializing in the research, development, production and sales of high-strength standard and non-standard fasteners. After more than 30 years of pioneering work, the company has won many honorary titles such as "high-tech enterprise", "AAA level contract abiding and credit worthy unit", "provincial science and technology based small and medium-sized enterprise", and has successively passed IATF16949 automobile industry quality management system certification, ISO14001 environmental management system certification and GB/T45001 occupational health and safety management system certification.

30 +

Specializing in fastener research and development for 30 years

30 +

It has dozens of national patents

MORE +
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NEWS

More than 30 years of fastener R&D experience

Introduction to bolt strength classes

Introduction to bolt strength classes

08

2022-09

Introduction to bolt strength classes

Strength grades are classified according to mechanical properties. According to the relevant standards, the bolt performance grade is divided into 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9 and more than 10 grades, of which 8.8 and above bolts made of low-carbon alloy steel or medium carbon steel and heat treatment (quenching, tempering), commonly known as high-strength bolts, the rest are commonly known as ordinary bolts. The bolt performance grade number has two parts consisting of numbers, which indicate the nominal tensile strength value of the bolt material and the flexural strength ratio. For example.

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2022-09

Bolt manufacturing process

The first is the punching of the head, where the head of the screw is punched out of the wire and the wire is cut. The second is thread rolling, where two files are used to thwart the threads on top of the previous process.

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2022-09

Performance grades for hexagonal flange bolts

The bolt performance grade is composed of two numerical parts, which indicate the nominal tensile strength value and the flexural strength ratio of the bolt material.

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2022-09

What are the common automotive fasteners

Generally we use most of the fasteners belong to the type of general-purpose parts, its standard type is still quite high, the common fastener parts are the following 12 kinds:

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Weide Auto Parts Co., Ltd

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ADD

No. 399 Kaifa Road, North District, International Automobile and Motorcycle Parts Industry Base, Rui'an City, Zhejiang Province

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TEL

 0086-577-65385966  

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E-MAIL

benpan@chinaweide.com

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