NF ISO 3316

Assembly tools for screws and nuts - Attachments for hand-operated square drive socket wrenches - Dimensions and tests

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

a) the overall dimensions;

b) the minimum Rockwell hardness value for their driving squares;

c) the method of torque testing;

d) the minimum torsional strength values;

e) the designation; and

f) the marking.

NOTE 2 For the specification of square adaptors with a hexagon or cylindrical flat drive, for power socket wrenches, see ISO 3317.

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