Standard No.:	GB/T 196-2025
English Name:	General purpose metric screw threads—Basic dimensions
Chinese Name:	普通螺纹 基本尺寸
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:	2025-03-28
Implemented on:	2025-10-1
Status:	valid
Superseding:	GB/T 196-2003 General Purpose Metric Screw Threads-Basic Dimensions
Target Language:	English
File Format:	PDF
Word Count:	6000 words
Translation Price(USD):	180.0
Delivery:	via email in 1 business day

GB/T 196-2025 General purpose metric screw threads - Basic dimensions English 1 Scope This document specifies the basic dimensions of general purpose metric screw threads according to the design profiles of GB/T 192 and the dimeter and pitch series of GB/T 193. This document is applicable to the metric fastening screw threads. 2 Normative references The following referenced documents are indispensable for the application 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 purposes of this standard, the terms defined 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 d3 minor diameter of external thread on design profile P pitch H fundamental triangle height H1 thread height of internal thread on design profile

Foreword I 1 Scope 2 Normative references 3 Terms and definitions 4 Symbols 5 Basic dimensions Bibliography