BS 4311-2:2009

This standard BS 4311-2:2009 Gauge blocks manufactured to imperial specification is classified in these ICS categories:

• 17.040.30 Measuring instruments

This British Standard specifies requirements for accessories intended for use with metric and inch gauge blocks conforming to BS EN ISO 3650 and BS 4311‑1:2007+C1:2009, and includes two types of measuring jaw (Type A and Type B), scriber points and centre points, bases and holders. Requirements for general dimensions and the form, material, surface finish and accuracy of various features are specified.

Examples of typical assemblies of accessories are shown in Figure 1 and notes on their use are given in Annex A.

Annex B gives details of other items which may be used with gauge blocks and accessories.

NOTE Type B jaws, scriber points, centre points and holders specified for metric gauge blocks are fully compatible with gauge blocks in inch units.