Standard No.:	GB/T 192-2025
English Name:	General purpose metric screw threads—Profiles
Chinese Name:	普通螺纹 牙型
Chinese Classification:	J04    Basic standards and general methods
Professional Classification:	GB    National Standard
ICS Classification:	21.040.10 21.040.10    Metric screw threads 21.040.10
Source Content Issued by:	SAMR; SAC
Issued on:	2025-05-30
Implemented on:	2025-12-1
Status:	valid
Superseding:	GB/T 192-2003 General purpose metric screw threads-Basic profile
Target Language:	English
File Format:	PDF
Word Count:	7000 words
Translation Price(USD):	210.0
Delivery:	via email in 1 business day

GB/T 192-2025 General purpose metric screw threads — Profiles 1 Scope This document specifies the basic and design profiles for general purpose metric screw threads (M). This document is applicable to the metric fastening screw threads. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 14791 Screw threads - Vocabulary (GB/T 14791-2013, ISO 5408:2009, IDT) 3 Terms and definitions For the purpose of this document, the terms and definitions given in GB/T 14791 apply. 4 Symbols For the purposes of this document, the following symbols apply. D: major diameter of internal thread (nominal diameter) d: major diameter of external thread (nominal diameter) D2: pitch diameter of internal thread d2: pitch diameter of external thread D1: minor diameter of internal thread d1: minor diameter of external thread on basic profile d3: minor diameter of external thread on design profile P: pitch H: fundamental triangle height H1: thread height of internal thread, and thread height of external thread on basic profile h3: thread height of external thread on design profile R: full root radius of external thread on design profile R1: radius on root corners of external thread on design profile

Contents Foreword II 1 Scope 2 Normative references 3 Terms and definitions 4 Symbols 5 Basic profile 6 Design profile