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BS A 297:1987
M00000048
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BS A 297:1987 Specification for internal drive, offset cruciform recess (Torq-Set(R)) for rotary fastening devices. Metric series
standard by BSI Group, 03/31/1987
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Specifies maximum and minimum dimensional requirements for rotary fastening devices, and for associated drivers and gauges, for metric design.Cross References:
BS 308:Part 1
BS 308:Part 3