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GB/T 6170-2015 PDF in English

GB/T 6170-2015 (GB/T6170-2015, GBT 6170-2015, GBT6170-2015)
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Standards related to: GB/T 6170-2015

GB/T 6170-2015: PDF in English (GBT 6170-2015)

GB/T 6170-2015
ICS 21.060.20
J 13
Replacing GB/T 6170-2000
Hexagon Nuts, Style 1
[ISO 4032.2012, Hexagon Regular Nuts (Style 1) – Product
Grades A and B, MOD]
1 型六角螺母
Issued by. General Administration of Quality Supervision, Inspection and
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative References ... 6
3 Dimension ... 7
4 Technical Conditions and Reference Standards ... 9
5 Markings ... 10
GB/T 6170 is one of the serial national standards for “Hexagon Nuts (Part)”, which
--- GB/T 41 Hexagon Nuts, Style 1 – Product Grade C;
--- GB/T 6170 Hexagon Nuts, Style 1;
--- GB/T 6171 Hexagon Nuts, Style 1 – Fine Pitch Thread;
--- GB/T 6172.1 Hexagon Thin Nuts;
--- GB/T 6173 Hexagon Thin Nuts – Fine Pitch Thread;
--- GB/T 6174 Hexagon Thin Nuts – Unchamfered;
--- GB/T 6175 Hexagon Nuts, Style 2;
--- GB/T 6176 Hexagon Nuts, Style 2 – Fine Pitch Thread.
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard replaced GB/T 6170-2000 Hexagon Nuts, Style 1; compared with GB/T
6170-2000, this Standard mainly has the following changes.
--- Delete “if other technical requirements are needed, ... the selection in GB/T
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
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
1 Scope
This Standard specifies the type and dimension, technical conditions and markings of
hexagon nuts, style 1.
This Standard is applicable to the hexagon nuts, style 1 with thread specification
M1.6~M64; performance grade of Grade 6, 8, 10, A2-50, A2-70, A4-50, A4-70, CU2,
CU3 and AL4; Product Grade A and B. Grade A is applied to the nuts with D≤16mm;
while Grade B is applied to the nuts with D>16mm.
NOTE. see GB/T 6175 for the hexagon nuts, style 2.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
GB/T 90.1 Fasteners – Acceptance Inspection (GB/T 90.1-2002, ISO 3269.2000,
GB/T 90.2 Fasteners – Marking and Packaging
GB/T 193 General Purpose Screw Threads – Diameters and Pitches (GB/T 193-
2003, ISO 261.1998, MOD)
GB/T 1237 Designation System for Fasteners (GB/T 1237-2000, eqv ISO
GB/T 3098.2 Mechanical Properties of Fasteners – Nuts (GB/T 3098.2-2015, ISO
898-2.2012, MOD)
GB/T 3098.10 Mechanical Properties of Fasteners - Bolts, Screws, Studs and Nuts
Made of Non-Ferrous Metals (GB/T 3098.10-1993, eqv ISO 8839.1986)
GB/T 3098.15 Mechanical Properties of Fasteners – Nuts Made of Stainless Steel
(GB/T 3098.15-2014, ISO 3506-2.2009, MOD)
GB/T 3103.1 Tolerances for Fasteners – Bolts, Screws and Nuts (GB/T 3103.1-
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.