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GB/T 1237-2000 English PDF (GBT1237-2000)

GB/T 1237-2000 English PDF (GBT1237-2000)

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GB/T 1237-2000: Designation system for fasteners

This Standard specifies a system for the designation of fasteners in product standards.
GB/T 1237-2000
GB
NATIONAL STANDARD OF
THE PEOPLE REPUBLIC OF CHINA
ICS 21.060.01
J 13
Replacing GB/T 1237-1988
Designation system for fasteners
(eqv ISO 8991.1986)
ISSUED ON. SEPTEMBER 26, 2000
IMPLEMENTED ON. FEBRUARY 1, 2001
Issued by. State Quality and Technical Supervision
Table of Contents
Foreword ... 3
ISO Foreword ... 4
1 Scope ... 5
2 Normative references ... 5
3 Designation system ... 5
4 Simplification principle of designation ... 6
5 Designation examples ... 7
Foreword
This Standard equivalently uses an International Standard ISO 8991.1986 Designation system for fasteners.
ISO 8991 does not specify the designation system for fastener name, standard number, type and size, performance level and surface treatment as well as the simplification principle of designation, which are specified in this Standard (sub- clauses 3.2 ~ 3.4, Clause 4).
This Standard modified and supplemented the content of ?€?designation
examples?€? in ISO 8991 (Clause 5).
This Standard is a revision of GB/T 1237-1988. The main modifications are as follows.
a) moved ?€?type?€? of GB/T 1237-1988 before ?€?performance level or hardness or material?€? in this Standard, merged with ?€?other requirements for type and size?€? of GB/T 1237-1988 and modified the name to ?€?product type?€? (see
3.1);
b) added designation positions for ?€?thread length or rod length?€? or ?€?pull-up type?€? (see 3.1);
c) ?€?-?€? in designation is allowed to omit (see 4.2);
d) modified and supplemented the content of ?€?5 Designation examples?€?
(Clause 5).
Since the implementation of this Standard, GB/T 1237-1988 is replaced
simultaneously.
This Standard was proposed by National Machinery Industry Bureau.
This Standard shall be under the jurisdiction of National Technical Committee on Fasteners of Standardization Administration of China.
Main drafter of this Standard. Institute of Mechanical Science.
This Standard shall be interpreted by Secretariat of National Technical Committee on Fasteners of Standardization Administration of China.
Designation system for fasteners
1 Scope
This Standard specifies a system for the designation of fasteners in product standards.
2 Normative references
The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. At the time of publication, the editions indicated are valid. All standards are subject to revision. The parties who are using this Standard shall explore the possibility of using the latest version of the following standards.
GB/T 97.1-1985, Plain washers - Normal series - Product grade A (eqv ISO 7089.1983)
GB/T 119.2-2000, Parallel Pins, of Hardened Steel and Martensitic Stainless Steel (eqv ISO 8734.1997)
GB/T 828-1988, Slotted pan head set setscrews with dog point
GB/T 845-1985, Cross recessed pan head tapping screws (eqv ISO
7049.1983)
GB/T 886-1986, Rings for shoulder
GB/T 5782-2000, Hexagon Head Bolts (eqv ISO 4014.1999)
GB/T 6170-2000, Hexagon nuts, style 1 (eqv ISO 4032.1999)
GB/T 12618-1990, Mushroom head break mandrel blind rivets
GB/T 13911-1992, Expression Methods for Metallic Coating and Chemical
Treatment
3 Designation system
3.1 The complete designation of the fasteners shall be expressed in the content and order specified in Figure 1.
3.2 The designation system for fastener name, designation number, type and

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