GB/T 6170-2015Hexagon nuts, style 1 (English PDF)

3098.2 and GB/T 3103.1." (Chapter 1 of Edition 2000);

--- Add "NOTE. Hexagon Nuts, Style 2 refers to GB/T 6175" (Chapter 1);

--- Unify the reference thread standards to be GB/T 193, GB/T 9145 (Chapter 2);

--- Increase the mechanical properties of steel nuts. QT – Quenching and Tempering

(Table 3);

--- Add the hot-dipped galvanized technical requirements of steel nuts as per GB/T

5267.3 (Table 3);

--- Add the passivation technology requirements of stainless steel nuts as per GB/T

5267.4.

This Standard adopts re-drafting method of modify and use ISO 4032.2012 Hexagon

Regular Nuts (Style 1) Product Grades A and B.

Compared with ISO 4032.2012, this Standard has the following technical differences.

--- Delete ISO 4032 provision. "if other technical requirements are needed,...

selection in ISO 4759-1" (Chapter 1), which don't belong to the contents specified

by this Standard;

--- In the normative references, use national standards to replace the international

standards (Chapter 2); add the reference of GB/T 6175 (Chapter 1), GB/T 90.2

(Table 3), GB/T 193 (Table 3), GB/T 5267.4 (Table 3), GB/T 9145 (Table 3) and

GB/T 1237 (5.1); delete the reference of ISO 724 or ISO 965-1, so that conform

to China's fastener basic standard;

--- Increase the provisions of performance grades of nonferrous nuts, expand the

applicable range of standard;

--- To carry out the basic standard, increase the mechanical properties of steel nuts.

QT – Quenching and Tempering (Table 3);

--- Increase the packaging technical requirements (Table 2), so that conform to

China's fastener basic standard;

--- Modify the marking examples into simplified marking examples (5.2); so that

conform to the provisions of GB/T 1237.

This Standard also has the following editorial changes.

--- Modify the standard name;

--- Delete the bibliography of ISO 4032.

This Standard was proposed by China Machinery Industry Federation.

This Standard shall be under the jurisdiction of National Technical Committee for

Standardization of Fastener (SAC/TC 85).

Drafting organizations of this Standard. China Productivity Center for Machinery.

Participating drafting organizations of this Standard. HaiYan YuXing Nuts Co., Ltd.,

Dongfeng Motor Fastener Co., Ltd., Wuxi Standard Fastener Factory Co., Ltd., Ningbo

Mingli Fasteners Co., Ltd., Zhoushan Zhengyuan Standard Parts Co., Ltd., Zhejiang

Haili Co., Ltd., and Aozhan Industrial Co., Ltd.

This Standard shall be interpreted by the Secretariat of National Technical Committee

for Standardization of Fastener.

The historical editions replaced by this Standard are as follows.

--- GB 51-1958, GB 51-1976;

--- GB 52-1958, GB 52-1976;

Hexagon Nuts, Style 1