Standardization of series of internationally interchangeable fastening and traversing screw threads with a minimum variety of basic profiles, pitches and diameters including tolerances and verification.

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Published ISO standards *


ISO standards under development *

Participating members
Observing members

* number includes updates

Liaison Committees to ISO/TC 1

The committees below can access the documents of ISO/TC 1:

Reference Title ISO/IEC
ISO/TC 2 Fasteners ISO
ISO/TC 2/SC 11 Fasteners with metric external thread ISO
ISO/TC 2/SC 12 Fasteners with metric internal thread ISO
ISO/TC 2/SC 13 Fasteners with non-metric thread ISO
ISO/TC 114 Horology ISO
ISO/TC 153 Valves ISO


Liaison Committees from ISO/TC 1

ISO/TC 1 can access the documents of the committees below:

Reference Title ISO/IEC
ISO/TC 2 Fasteners ISO
ISO/TC 5/SC 5 Threaded fittings, solder fittings, welding fittings, pipe threads, thread gauges ISO
ISO/TC 10/SC 6 Mechanical engineering documentation ISO
ISO/TC 20/SC 4 Aerospace fastener systems ISO
ISO/TC 29/SC 9 Tools with defined cutting edges, holding tools, cutting items, adaptive items and interfaces ISO
ISO/TC 31/SC 9 Valves for tube and tubeless tyres ISO
ISO/TC 58/SC 2 Cylinder fittings ISO
ISO/TC 67/SC 5 Casing, tubing and drill pipe ISO
ISO/TC 82 Mining ISO
ISO/TC 94/SC 15 Respiratory protective devices ISO
ISO/TC 114 Horology ISO
ISO/TC 149 Cycles ISO
ISO/TC 150/SC 5 Osteosynthesis and spinal devices ISO
ISO/TC 213 Dimensional and geometrical product specifications and verification ISO


Organizations in liaison (Category A and B)
Acronym Title Category
WCO World Customs Organization B

ISO/TC 1 - Secretariat

SAC [China]

Standardization Administration of China
No. 9 Madian Donglu, Haidian District
Beijing 100088

Tel: +8610 8226 2644
Fax: +8610 8226 0660