GB/T 16674.1-2016 (GB/T16674.1-2016, GBT 16674.1-2016, GBT16674.1-2016) & related versions
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GB/T 16674.1-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 21.060.10
J 13
Replacing GB/T 16674.1-2004
Hexagon Bolts with Flange – Small Series
(ISO 15071.2011, Hexagon Bolts with Flange –
Small Series – Product Grade A, MOD)
ISSUED ON. FEBRUARY 24, 2016
IMPLEMENTED ON. JUNE 1, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Dimensions ... 6
4 Requirements and Reference Standards ... 11
5 Designation ... 12
Annex A (Normative) Gauging of Hexagon Flange Heads ... 13
Foreword
This Part of GB/T 16674 belongs to a complete group of national standards “Hexagon
Bolts with Flange”. It comprises the following.
-- GB/T 5789 Hexagon Flange Bolts – Heavy Series – Product Grade B
-- GB/T 5790 Hexagon Flange Bolts – Heavy Series – Reduced Shank – Product
Grade B
-- GB/T 16674.1 Hexagon Bolts with Flange – Small Series
-- GB/T 16674.2 Hexagon Bolts with Flange – Fine Pitch Thread – Small Series
This Part is the 1st Part of GB/T 16674.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part replaces GB/T 16674.1-2004, Hexagon Bolts with Flange – Small Series.
Compared with GB/T 16674.1-2004, the main technical differences are as follows.
-- it deletes “If, in special cases, specifications other than those listed in this
Standard are required, they can be selected from existing Standards, ... GB/T
3098.6 and GB/T 3103.1.” (Chapter 1, Edition 2004);
-- it modifies the surface defects of steel products to be in accordance with the
specifications of GB/T 5779.1 (Table 2);
-- it adds that the surface of steel bolts is as processed and deletes surface oxidation
treatment (Table 2);
-- it adds the technical requirements of non-electrolytically applied zinc flake
coatings of steel bolts in accordance with GB/T 5276.2 (Table 2);
-- it adds the technical requirements of passivating treatment of stainless steel bolts
in accordance with GB/T 5267.4 (Table 2); and
-- it is only allowed to omit in Designation that the surface is as processed, instead
of oxidation treatment (5.2).
This Part was redrafted by reference to ISO 15071.2011, Hexagon Bolts with Flange
– Small Series – Product Grade A.
The technical differences between this Part and ISO 15071.2011 and their reasons are
as follows.
-- it deletes the specification of ISO 15071.2011, “If, in special cases, specifications
other than those listed in this International Standard are required, they can be
selected from existing International Standards, ... ISO 965-2 and ISO 3506-1”
(Chapter 1), which does not belong to the content of this Standard;
-- in the Normative References, it uses Chinese standards to replace the
international standards (Chapter 2), adds the references of GB/T 90.2 (Table 2),
GB/T 5267.4 (Table 2), GB/T 5779.1 (Table 2) and GB/T 1237 (5.1), and deletes
the references of ISO 6157-3, in order to meet Chinese basic standards of
fasteners;
-- it modifies the surface defects of steel products to be in accordance with the
specifications of GB/T 5779.1 (Table 2);
-- it adds the technical requirements of passivating treatment of stainless steel bolts
and extend the scope of product use (Table 2);
-- it adds the technical requirements of packaging (Table 3), in order to meet
Chinese basic standards of fasteners; and
-- it modifies the Designation Example into the simplified Designation Example (5.2),
in order to meet the specifications of GB/T 1237.
The following editorial modifications are made in this Standard.
-- it changes the name of the standard; and
-- it deletes the Bibliography of ISO 15071.
This Part was proposed by China Machinery Industry Federation.
This Part shall be under the jurisdiction of the National Standardization Technical
Committee on Fasteners (SAC/TC 85).
The responsible drafting organizations of this Part. China Productivity Center for
Machinery.
The drafting organizations of this Part. Ningbo Ningli High-Strength Fastener Industrial
Co., Ltd. and Gem-Year Industrial Co., Ltd.
This Part shall be interpreted by the Secretariat of the National Standardization
Technical Committee on Fasteners.
The previous edition replaced by this Part is as follows.
-- GB/T 16674.1-2004
Hexagon Bolts with Flange – Small Series
1 Scope
This Part of GB/T 16674.1 specifies the dimensions, requirements and designation of
hexagon bolts with flange, small series.
This Part applies to hexagon bolts with flange, small series, of product grade A, with
threads from M5 up to and including M16, and property classes 8.8, 9.8, 10.9 and A2-
70.
2 Normative References
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition dated applies to this document. For
undated references, the latest edition of the referenced document (including any
amendments) applies to this Standard.
GB/T 2 Fasteners – Ends of Parts with External Thread (GB/T 2-2016, ISO
4753.2011, MOD)
GB/T 90.1 Fasteners – Acceptance Inspection (GB/T 90.1-2002, ISO 3269.2000,
IDT)
GB/T 90.2 Fasteners – Marking and Packaging (GB/T 90.2-2002)
GB/T 193 General Purpose Metric Screw Threads – Diameters and Pitches (GB/T
193-2003, ISO 261.1998, ISO General Purpose Metric Screw Threads – General
Plan, MOD)
GB/T 1237 Designation System for Fasteners (GB/T 1237-2000, eqv. ISO
8991.1986)
GB/T 3098.1 Mechanical Properties of Fasteners – Bolts, Screws and Studs
(GB/T 3098.1-2010, ISO 898-1.2009, MOD)
GB/T 3098.6 Mechanical Properties of Fasteners – Stainless Steel Bolts, Screws
and Studs (GB/T 3098.6-2014, ISO 3506-1.2009, MOD)
GB/T 3103.1 Essential Oils and Aromatic Extracts – Determination of Residual
Benzene Content (GB/T 3103.1-2002, ISO 4759-1.2000, IDT)
GB/T 5267.1 Fasteners – Electroplated Coatings (GB/T 5267.1-2002, ISO
4042.1999, IDT)
......
GB/T 16674.1-2004
ICS 21.060.10
J 13
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Replacing GB/T 16674-1996
Hexagon bolts with flange - Small series
(ISO 15071 . 1999, Hexagon bolts with flange –
Small series - Product grade A, MOD)
ISSUED ON. FEBRUARY 10, 2004
IMPLEMENTED ON. AUGUST 1, 2004
Issued by.
General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration Committee of the People’s
Republic of China
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Dimensions ... 6
4 Technical conditions and normative reference ... 11
5 Labelling ... 11
Annex A (Normative) The test of hexagon flange head ... 12
Foreword
This Part is one of the product series of national standards “Hexagon bolts with flange”.
The series includes.
a) GB/T 5789-1986 Hexagon bolts with flange - Heavy series - Grade B;
b) GB/T 5790-1986 Hexagon bolts with flange - Heavy series - Reduced shank -
Grade B;
c) GB/T 16674.1-2004 Hexagon bolts with flange - Small series;
d) GB/T 16674.2-2004 Hexagon bolts with flange - Fine pitch thread - Small
series.
This Part is Part 1 of GB/T 16674.
The revision of this Part adopts ISO 15071.1999 “Hexagon bolts with flange small series
product grade A” (English version), the main changes are as follows.
- “Product grade A” is indicated in the standard name of ISO 15071, this is not
specified in this Part;
- This Part specifies packaging technical requirements (See table 2) which is not
specified in ISO 15071.
- ISO 15071 does not provide simplified marking, this Part provides an example of
simplified marking according to the simplified principle of GB/T 1237 (See 5.2).
This Part replaces GB/T 16674-1996 Hexagon bolts with flange - small series.
Compared with GB/T 16674-1996, main changes of this Part are as follows.
- ADJUST the diagonal-angle width value emin comprehensively;
- ADJUST the head height value kmax;
- ADJUST the wrenching height value kwmin;
- ADJUST width across value smin comprehensively.
Annex A of this Part is normative.
This Part was proposed by China Machinery Industry Federation.
This Part shall be under the jurisdiction of National Technical Committee for Fastener
Standardization.
This Part was drafted by the Mechanical Science Research Institute.
The previous versions replaced by this Part are as follows.
- GB/T 5787-1986, and GB/T 5788-1986;
- GB/T 16674-1996.
Hexagon bolts with flange - Small series
1 Scope
This Part specifies hexagon bolts with flange small series - thread specifications of
M5-M16, performance grade of 8.8, 9.8, 10.9 and A2-70, and product grade of A.
If other technical requirements are required, it shall be selected from current standards
(such as GB/T196. GB/ T3106. GB/T3098.1, GB/T3098.6 and GB/T3103.1).
2 Normative references
The provisions contained in the following standards become part of this Standard,
through the reference of this Standard. At the time of publication of this Standard, the
shown versions of these standards are valid. All standards are subject to revision, and all
parties who use this Standard are encouraged to investigate the possibility of applying the
newest version of these standards.
GB/T 2 Fasteners - Ends of parts with external thread (GB/T 2-2001, idt ISO 4753. 1999)
GB/T 90.1 Fasteners - Acceptance inspection (GB/T 90.1-2002, idt ISO 3269. 2000)
GB/T 90.2 Fasteners - Marking and packaging
GB/T 196 General purpose metric screw threads - Basic dimensions (GB/T 196-2003,
ISO 724. 1993, ISO general purpose metric screw threads - Basic dimensions, MOD)
GB/T 197 General purpose metric screw threads - Tolerances (GB/T 197-2003, ISO
965-1. 1998, ISO general purpose metric screw threads – Tolerances - Part 1. Principles
and basic data, MOD)
GB/T 1237 Designation system for fasteners (GB/T 1237-2000, eqv ISO 8991. 1986)
GB/T 3098.1 Mechanical properties of fasteners - Bolts, screws and studs (GB/T
3098.1-2000, idt ISO 898-1. 1999)
GB/T 3098.6 Mechanical properties of corrosion-resistant stainless steel fasteners - Part
1. Bolts, screws and studs (GB/T 3098.6-2000, idt ISO 3506-1. 1997)
GB/T 3103.1 Tolerances for fasteners - Bolts, screws, studs and nuts (GB/T 3103.1-2002,
idt ISO 4759-1. 2000)
c Chamfered end (GB/T 2).
d β=15°-30°.
e Kw is the wrenching height. See Note in Table 1.
f The length of incomplete thread u≤2P.
Figure 1 Hexagon bolts with flange - Stout bolt (standard type)
Note. Other dimensions are shown in Figure 1.
a Rounded or chamfered or conical.
b d2 ≈ medium diameter of thread (The billet diameter of rolling thread).
Figure 2 Hexagon bolts with flange - Reduced shank (type R) (operating
requirement)
Table A.1 Dimension of gauge unit in mm
Thread
specification
Gauge A Gauge B Gauge C
Wa Ta Wb Tb
min
Wc
min
Tc
max min max min max min max min
M5 8.09 8.08 2.30 2.29 7.58 7.57 3 14 1.08 1.07
M6 9.25 9.24 2.90 2.89 8.70 8.63 3 16 1.19 1.18
M8 11.56 11.55 3.80 3.79 10.94 10.93 4 20 1.31 1.30
M10 15.02 15.01 4.30 4.29 14.25 14.24 4 24 1.81 1.80
M12 17.33 17.32 5.40 5.39 16.49 16.43 5 29 2.20 2.19
M14 20.79 20.78 5.60 5.59 19.85 19.84 5 32.5 2.55 2.54
M16 24.26 24.25 6.80 6.79 23.14 23.55 6 37 2.96 2.95
......
| Standard ID | GB/T 16674.1-2016 (GB/T16674.1-2016) | | Description (Translated English) | Hexagon bolts with flange -- Small series | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J13 | | Classification of International Standard | 21.060.10 | | Word Count Estimation | 11,146 | | Date of Issue | 2016-02-24 | | Date of Implementation | 2016-06-01 | | Older Standard (superseded by this standard) | GB/T 16674.1-2004 | | Quoted Standard | GB/T 2; GB/T 90.1; GB/T 90.2; GB/T 193; GB/T 1237; GB/T 3098.1; GB/T 3098.6; GB/T 3103.1; GB/T 5267.1; GB/T 5267.2; GB/T 5267.4; GB/T 5276; GB/T 5779.1; GB/T 9145; GB/T 16938 | | Adopted Standard | ISO 15071-2011, MOD | | Drafting Organization | Productivity Promotion Center in the machine | | Administrative Organization | National Fastener Standardization Technical Committee (SAC/TC 85) | | Proposing organization | China Machinery Industry Federation | | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | | Standard ID | GB/T 16674.1-2004 (GB/T16674.1-2004) | | Description (Translated English) | Hexagon bolts with flange - Small series | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J13 | | Classification of International Standard | 21.060.10 | | Word Count Estimation | 9,928 | | Date of Issue | 2004-02-10 | | Date of Implementation | 2004-08-01 | | Older Standard (superseded by this standard) | GB/T 16674-1996 | | Quoted Standard | GB/T 2; GB/T 90.1; GB/T 90.2; GB/T 196; GB/T 197; GB/T 1237; GB/T 3098.1; GB/T 3098.6; GB/T 3103.1; GB/T 3106; GB/T 5267.1; GB/T 5276; GB/T 5779.3; GB/T 16938 | | Adopted Standard | ISO 15071-1999; MOD | | Drafting Organization | Mechanical Engineering Research Institute | | Administrative Organization | National Standardization Technical Committee fasteners | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 3, 2004 (No. 65 overall) | | Proposing organization | China Machinery Industry Federation | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee | | Summary | This standard specifies: Thread specifications for M5 ~ M16, the performance rating of 8. 8, 9. 8, 10. 9 and A2-70, product class A Series Small Hexagon Hexagon flange bolts. For additional technical requirements, should the current standards (such as GB/T 196, GB/T 3106, GB/T 3098. 1, GB/T 3098. 6 and GB/T 3103. 1) is selected. | | Standard ID | GB/T 16674-1996 (GB/T16674-1996) | | Description (Translated English) | Hexagon flange bolts--Small series | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J13 | | Classification of International Standard | 21.060.10 | | Word Count Estimation | 12,189 | | Date of Issue | 1996/12/18 | | Date of Implementation | 1997/7/1 | | Adopted Standard | ISO 4162-1990, IDT | | Regulation (derived from) | Announcement of Newly Approved National Standards 2004 No. 3 (No. 65 overall) | | Proposing organization | Ministry of Machinery Industry of the People Republic of China | | Issuing agency(ies) | State Bureau of Technical Supervision |
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