GB/T 3098.2-2015
Mechanical properties of fasteners.Nuts (English Version)

Standard No.: GB/T 3098.2-2015
Language: Chinese, Available in English version
Release Date: 2015
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 3098.2-2015
Replace: GB/T 3098.2-2000 GB/T 3098.4-2000

Scope: This part of GB/T 3098 specifies the mechanical and physical properties of nuts with coarse and fine threads made of carbon steel or alloy steel when tested at an ambient temperature of 10 °C to 35 °C. In this ambient temperature range, nuts complying with the technical requirements of this part may not meet the specified mechanical and physical properties at higher or lower temperatures. Nuts applicable to this section: a) Made of carbon steel or alloy steel; b) Coarse thread specification: M5≤D≤M39, and fine thread specification: M8×1≤D≤M39×3; c) Conforming to GB Ordinary thread specified in /T 192; d) Combination of diameter and pitch in accordance with GB/T 193 and GB/T 9144; e) Specified performance level and guaranteed load; f) Specified three types of thin nuts, standard nuts and high nuts Nut type; g) nut height m_min≥0.45D; h) outer diameter or width across sides s_min≥1.45D (see Appendix A); i) performance and specified performance level (GB/ T 3098.1) for use with bolts, screws and studs. See GB/T 5267.3 for technical requirements on the surface treatment of hot-dip galvanized nuts. This part does not specify the following performance requirements: -- Effective torque type locking performance (see GB/T 3098.9); -- Torque-clamping force performance (see GB/T 16823.3 for test methods); -- Weldability; -- corrosion resistance.

GB/T 3098.2-2015 Referenced Document

GB/T 16823.3 Fasteners—Torque/clamp force testing
GB/T 16825.1 Metallic materials—Calibration and verification of static uniaxial testing machines—Part1:Tension/compression testing machines—Calibration and verification of the force-measuring system*， 2022-10-14 Update
GB/T 192 General purpose metric screw threads--Basic profile
GB/T 193 General purpose metric screw threads--General plan
GB/T 228.1 Metallic materials—Tensile testing—Part 1: Method of test at room temperature*， 2021-12-31 Update
GB/T 230.1 Metallic materials.Rockwell hardness test.Part 1:Test method*， 2018-05-14 Update
GB/T 231.1 Metallic materials—Brinell hardness test—Part 1: Test method*， 2018-05-14 Update
GB/T 3098.1 Mechanical properties of fasteners.Blots, screws and studs
GB/T 3098.9 Mechanical properties of fasteners—Prevailing torque type steel nuts*， 2020-03-31 Update
GB/T 4340.1 Metallic materials.Vickers hardness test.Part 1:Test method
GB/T 5267.3 Fasteners.Hot dip galvanized coatings
GB/T 5779.2 Fasteners-Surface discontinuities-Nuts
GB/T 6170 Hexagon nuts,style 1*， 2015-12-31 Update
GB/T 6175 Hexagon nuts, style 2*， 2016-02-24 Update
GB/T 90.3 Fasteners.Quality assurance system
GB/T 9144 General purpose metric screw threads--Preferable plan
ISO 18265:2013 Metallic materials.Conversion of hardness values
ISO/TR 16224 Technical aspects of nut design

GB/T 3098.2-2015 has been changed from GB/T 3098.4-2000 Mechanical properties of fasteners-Nuts-Fine pitch thread.