ISO 261 vs ISO 68-1 standard metric thread

Date:Jun 05, 2019

ISO 261 is  general purpose metric screw threads — General plan

ISO 68-1 is general purpose screw threads — Basic profile — Part 1: Metric screw threads

ISO 261 specifies ISO general purpose metric screw threads (M) having basic profile according to ISO 68-1. Basic dimensions are given in ISO 724. For tolerances see ISO 965-1.

ISO 68-1 specifies the basic profile for ISO general purpose metric screw threads (M).

ISO 261 Normative references as follows:

ISO 68-1:1998, ISO general purpose screw threads — Basic profile — Part 1: Metric screw threads.

ISO 262:1998, ISO general purpose metric screw threads — Selected sizes for screws, bolts and nuts.

ISO 724:1993, ISO general purpose metric screw threads — Basic dimensions.

ISO 965-1:1998, ISO general purpose metric screw threads — Tolerances — Part 1: Principles and basic data.

ISO 5408:1983, Cylindrical screw threads — Vocabulary.

ISO 68-1 Normative references as follows:

ISO 965-1:1998, ISO general purpose metric screw threads — Tolerances — Part 1: Principles and basic data.

ISO 5408:1983, Cylindrical screw threads — Vocabulary.

ISO 261  is International Standard ISO 261 was prepared by Technical Committee ISO/TC 1, Screw threads, Subcommittee SC 1, Basic data.

ISO 68 consists of the following parts under the general title ISO general purpose screw threads — Basic profile

— Part 1: Metric screw threads

— Part 2: Inch screw threads