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GB/T 16674.1-2004 English PDF (GBT16674.1-2004)

GB/T 16674.1-2004 English PDF (GBT16674.1-2004)

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GB/T 16674.1-2004: Hexagon bolts with flange -- Small series

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).
GB/T 16674.1-2004
ICS 21.060.10
J 13
NATIONAL STANDARD
OF THE PEOPLE 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 Republic of China;
Standardization Administration Committee of the PEOPLE
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 ??=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

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