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ISO 3317:1974
M00000008
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ISO 3317:1974 Assembly tools for screws and nuts - Square drive extension hexagon insert, for power socket wrenches
standard by International Organization for Standardization, 12/01/1974
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Full Description
This International Standard lays down dimensions for square drive extension hexagon inserts for power socket wrenches, listed under number 402 in ISO 1703, and specifies the hardness of driving squares and hexagon drive ends.