Identification of B.A. & B.S.F. Nuts & Bolts, and Identification of Unified Nuts, Bolts & Screws
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Details of Screwdriver for use with Plunge Milled Slots
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Dimensions.of Threads, not included in B.S.2779 (5/16" & 7/16" Pipe Diameters, Special Truncation)
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