International Standard ISO 965-1 was prepared by Technical Committee ISO/TC 1, Screw threads, Subcommittee SC 2, Tolerances. This third edition cancels and replaces the second edition (ISO 965-1:1980), which has been technically revised.

ISO 965-1:2013 specifies a tolerance system for ISO general purpose metric screw threads (M) conforming to ISO 261. The tolerance system refers to the basic profile according to ISO 68-1.

This fourth edition cancels and replaces the third edition (ISO 965-1:1998), which has been technically revised. It also incorporates the Technical Corrigendum ISO 965-1:1998/Cor.1:2009.

This part of ISO 965 specifies a tolerance system for ISO general purpose metric screw threads (M) according to ISO 261. The tolerance system refers to the basic profile according to ISO 68-1.

This fourth edition cancels and replaces the third edition (ISO 965-1:1998), which has been technically revised. It also incorporates the Technical Corrigendum ISO 965-1:1998/Cor.1:2009.

ISO 965-1 - ISO general purpose metric screw threads -- Tolerances -- Part 1: Principles and basic data Location tolerance zones relative to the zero line (nominal size) Basic tolerances for internal and external threads

ISO 965-1 standard for metric screw threads tolerances. Covers principles, basic data, tolerance positions, grades, and thread engagement. For engineering use.

This fifth edition cancels and replaces the fourth edition (ISO 965-1:2013), which has been technically revised. It also incorporates the AMENDMENT ISO 965-1:2013/Amd.1:2021.

A list of all parts in the ISO 965 series can be found on the ISO website. Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html .