1 Scope
This standard specifies the prevailing torque type all-metal hexagon nuts, of style 1, with threads from M5 up to and including M36 and product grades A and B, in product grade A for threads up to and including 16mm and product grade B for threads above 16mm, and with property classes 5, 8 and 10.
Note: The dimensions of the nuts with the exception of kmax, correspond to those given in GB/T 6170.
If other specifications are required, they should be selected from existing standards, for example GB/T 196, GB/T 3098.9 and GB/T 3103.1.
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 were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
GB/T 90-1985 Acceptance Inspection, Marking and Packaging of Fasteners (eqv ISO 3269:1984)
GB/T 196-1981 General Purpose Metric Screw Threads - Basic Dimensions for Diameter from 1 to 600mm
GB/T 197-1981 General Purpose Screw Threads - Tolerances and Fits for Diameter from 1 to 355mm
GB/T 1237-2000 Designation System for Fasteners (eqv ISO 8991:1986)
GB/T 3098.9-1993 Mechanical Properties of Fasteners - Prevailing Torque Type Steel Hexagon Nuts (eqv ISO 2320:1983)
GB/T 3103.1-1982 (confirmed in 1988) Tolerances for Fasteners - Bolts, Screws and Nuts (eqv ISO 4759-1:1978)
GB/T 5267-1985 Electroplated Coatings on Threaded Fasteners
GB/T 5276-1985 Fasteners - Bolts, Screws, Studs and Nuts - Symbols and Designations of Dimensions (eqv ISO 225:1983)
GB/T 5779.2-2000 Fasteners - Surface Discontinuities – Nuts (idt ISO 6157-2:1995)
GB/T 6170-2000 Hexagon Nuts, Style 1 (eqv ISO 4032:1999)
GB/T 16938-1997 Fasteners - General Requirements for Blots, Screws, Studs and Nuts (idt ISO 8992:1986)
3 Dimensions
Note: Symbols and designations of dimensions are specified in GB/T 5276.
1) Prevailing torque element, shape optional.
Foreword i
ISO Foreword iii
1 Scope
2 Normative References
3 Dimensions
4 Requirements and Reference Standards
5 Designation
