BSF Countersunk Allen Key Wrench Socket Head Screws Self Colour Steel

Thread: BSF. Type: Countersunk Socket Machine Screws. Material: Self Colour Steel (Black) High Tensile. Thread sizes 1/4"- 26tpi, 5/16" - 22 tpi, 3/8" - 20 tpi & 1/2" - 16 tpi. TECHNICAL INFORMATION.

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