ISO/PWI 3650

Geometrical Product Specifications (GPS) — Length standards — Gauge blocks

General information

Current stage: 00.00 Proposal for new project received Mar 16, 2026

Originator: ISO

Owner: ISO/TC 213 Dimensional and geometrical product specifications and verification

Type: International Standard

Scope

This International Standard specifies the most important design and metrological characteristics of gauge blocks with a rectangular cross section and a nominal length ln ranging from 0,5 mm to 1000 mm.
Limit deviations and tolerances are stated for the calibration grade K and for the grades 0, 1 and 2 for various measuring purposes.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 3650:1998

PUBLISHED
ISO 3650:1998/Cor 1:2008

NOW

IN_DEVELOPMENT
ISO/PWI 3650
00.00 Proposal for new project received
Mar 16, 2026