GB/T 2-2016 English PDF (GBT2-2016)

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GB/T 2-2016: Fasteners -- Ends of parts with external thread
GB/T 2-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 21.060.10
J 13
Replacing GB/T 2-2001
Fasteners – Ends of Parts with External Thread
(ISO 4753.2011, Fasteners –
Ends of Parts with External ISO Metric Thread, MOD)
ISSUED ON. FEBRUARY 24, 2016
IMPLEMENTED ON. JUNE 1, 2017
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 Application Scope ... 4 
2 Normative References ... 4 
3 Dimensions... 4 
3.1 General ... 4 
3.2 Ends which are included in the nominal length of the fastener ... 4 
3.3 Ends which are added to the specified nominal length of the fastener ... 8 
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 2-2001, Fasteners – Ends of Parts with External Thread.
Compared with GB/T 2-2001, the major technical changes of this Standard are as
follows.
-- it modifies the standard name;
-- it adds the end type of threaded cone point (CA) (3.2);
-- it modifies the values of end chamfers (3.2, 3.3).
This Standard was redrafted by modifying and adopting ISO 4753.2011, Fasteners –
Ends of Parts with External ISO Metric Thread (English version). The technical
differences between this Standard and ISO 4753.2011 and their reasons are as follows.
-- in Normative References, Chinese standards are used to replace international
standards (Chapter 2) to conform to Chinses basic standards of fasteners.
The following editorial change is made in this Standard.
-- it modifies the standard name.
This Standard was proposed by China Machinery Industry Federation.
This Standard shall be under the jurisdiction of the National Standardization Technical
Committee on Fasteners (SAC/TC 85).
The responsible drafting organization of this Standard. China Productivity Center for
Machinery.
The contributory drafting organizations of this Standard. Shaoxing Sunny High
Strength Fasteners Co., Ltd., Shanghai Jinma High Strength Fasteners Co., Ltd..
This Standard shall be interpreted by the Secretariat of the National Standardization
Technical Committee on Fasteners.
The previous editions of the standard replaced by this Standard are as follows.
-- GB/T 2-1958, GB/T 2-1976, GB/T 2-1985, GB/T 2-2001.
Fasteners – Ends of Parts with External Thread
1 Application Scope
This Standard specifies the form and dimensions of ends of parts with external metric
screw thread (e.g. bolt, screw and stud ends) recommended for use.
This Standard applies to standardized or non-standardized threaded parts.
For each end type, a symbol is specified and it is intended that these symbols be used
when specifying one of the ends for threaded fasteners.
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 documents (including all
amendments) applies to this Standard.
GB/T 78, Hexagon Socket Set Screws with Cone Point (GB/T 78-2007, ISO
4027.2003)
GB/T 5276, Fasteners – Bolts, Screws, Studs and Nuts – Symbols and Descriptions
of Dimensions (GB/T 5276-2015, ISO 225.2010, MOD)
3 Dimensions
3.1 General
See Figures 1 and 2 and Tables 1 to 4 for the form and dimensions of ends.
Symbols and descriptions of dimensions are specified in GB/T 5276.
3.2 Ends which are included in the nominal length of the fastener