This standard BS ISO 3316:2018 Assembly tools for screws and nuts. Attachments for hand-operated square drive socket wrenches. Dimensions and tests is classified in these ICS categories:
25.140.30 Hand-operated tools
This document applies to attachments for hand-operated square drive socket wrenches.
NOTE 1 The attachments for hand-operated square drive socket wrenches covered by this standard are the ones identified in ISO 1703:2018 under reference No. 5 1 00 03 0, 5 1 00 04 0, 5 1 00 04 1 and 5 1 00 05 0.
It specifies
the overall dimensions;
the minimum Rockwell hardness value for their driving squares;
the method of torque testing;
the minimum torsional strength values;
the designation; and
the marking.
NOTE 2 For the specification of square adaptors with a hexagon or cylindrical flat drive, for power socket wrenches, see ISO 3317.