GB/T 3098.14-2000

📋 Scope / 适用范围 ai_extracted

This standard specifies the test procedure for nuts made from free-cutting steel that are rejected by surface defect inspection in accordance with GB/T 5779.2. This standard applies to nuts that meet the following criteria: - Property classes conforming to GB/T 3098.2 or GB/T 3098.4; - Nominal thread diameters from 5 mm to 39 mm; - Product grades A and B.

📝 Foreword / 前言 ai_extracted

This standard is identical to the international standard ISO 10484:1997 "Widening test on nuts". GB/T 3098 bears the general title "Mechanical properties of fasteners" and includes the following parts: — GB/T 3098.1-2000 Mechanical properties of fasteners — Bolts, screws and studs — GB/T 3098.2-2000 Mechanical properties of fasteners — Nuts — Coarse thread — GB/T 3098.3-2000 Mechanical properties of fasteners — Set screws — GB/T 3098.4-2000 Mechanical properties of fasteners — Nuts — Fine pitch thread — GB/T 3098.5-2000 Mechanical properties of fasteners — Self-tapping screws — GB/T 3098.6-2000 Mechanical properties of fasteners — Stainless steel bolts, screws and studs — GB/T 3098.7-2000 Mechanical properties of fasteners — Self-drilling screws — GB/T 3098.8-1992 Mechanical properties of fasteners — Threaded fasteners for heat resistance — GB/T 3098.9-1993 Mechanical properties of fasteners — Prevailing torque type steel hexagon lock nuts — GB/T 3098.10-1993 Mechanical properties of fasteners — Bolts, screws, studs and nuts made of non-ferrous metals — GB/T 3098.11-1995 Mechanical properties of fasteners — Self-drilling self-tapping screws — GB/T 3098.12-1996 Mechanical properties of fasteners — Cone proof load test on nuts — GB/T 3098.13-1996 Mechanical properties of fasteners — Torsion test and minimum torque for bolts and screws with nominal diameters 1 to 10 mm — GB/T 3098.14-2000 Mechanical properties of fasteners — Widening test on nuts — GB/T 3098.15-2000 Mechanical properties of fasteners — Stainless steel nuts — GB/T 3098.16-2000 Mechanical properties of fasteners — Stainless steel set screws — GB/T 3098.17-2000 Mechanical properties of fasteners — Preload test for checking hydrogen embrittlement — Parallel bearing surface method This standard is a revision of Clause 4.2 of GB/T 5779.2-1986, with the following main modifications: a) It specifies only nuts made from free-cutting steel (Clause 1); b) It is applicable to all property classes (Clause 1); c) It cancels the provisions for comparison tests and the number of test specimens (Clauses 3-4); d) It adds provisions for prevailing torque type nuts (Clause 5). This standard was proposed by the State Bureau of Machinery Industry. This standard is under the jurisdiction of the National Technical Committee on Fasteners Standardization. This standard was drafted by the Machinery Science Research Institute. This standard is interpreted by the Secretariat of the National Technical Committee on Fasteners Standardization. GB/T 3098.14-2000 ISO Foreword ISO (International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75% of the member bodies casting a vote. International Standard ISO 10484 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 1, Mechanical properties of fasteners. National Standard of the People's Republic of China Mechanical properties of fasteners Widening test on nuts GB/T 3098.14-2000 idt ISO 10484:1997

📚 References & Relations / 引用与关联

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