Standard

BS ISO 965-1:2026

ISO general purpose metric screw threads. Tolerances - Principles and basic data

Current

•

Published:

30 Apr 2026

1 Scope

This document specifies a tolerance system for ISO general purpose metric screw threads (M) conforming to ISO 261 having basic and design profiles in accordance with ISO 68‑1.

Product Details

Descriptors

Formulae (mathematics)

Designations

Length

Thread forms

Standard deviation

Classification systems

Threads

Thread pitch

Form tolerances

Diameter

Threaded fasteners

Grades (quality)

Contour

Radius

Dimensional tolerances

ISO metric threads

External threads

Internal threads

ICS Codes

21.040.10 Metric screw threads

Committee

FME/9

International relationships

Identical to:

ISO 965-1

ISBN

978 0 539 29169 8

Publisher

BSI