UNC UNF BSW BSF FEDERSCHEIBEN RECHTECKIG 1/4 5/16 3/8 7/16 1/2 5/8" ZINK

To fit all imperial fasteners - UNC, UNF, BSW, BSF etc. Rectangular section (made from rectangular wire). Imperial Spring Washers. Imperial spring washers. Zinc Plated Spring Steel. Zinc plated spring steel.

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