1 Scope
This International Standard is applicable to the driving parts of hand-operated square drive socket wrenches identified in ISO 1703 under designations 6 1 00 04 0, 6 1 00 06 0, 6 1 00 06 1, 6 1 00 09 0, 6 1 00 10 0, 6 1 00 10 1, 6 1 00 01 0, 6 1 00 01 1, 6 1 00 03 0, 6 1 00 05 0 and 6 1 00 05 1.
NOTE These designations correspond to the former (old) designation numbers 253, 255, 256, 257, 251, 252 and 254.
It specifies
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a) the overall dimensions,
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b) the minimum Rockwell hardness value for their squares,
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c) the method of torque testing,
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d) the minimum torsional strength values,
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e) the method endurance of testing for ratchet handles,
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f) designation, and
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g) marking.