Threaded Bar Studding Threaded BAR / ROD ZINC PLATED/AUTO BLACK-Sizes from M4 up to M20. 5/16-24 UNF Thread (12" LONG) Auto. 3/8-24 UNF Thread (12" LONG) YELLOW. 7/16-20 UNF Thread (12" LONG) AUTO. 1/2-20 UNF Thread (12" LONG) YELLOW.
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