5/16" BSF Hex Bolt Set Screws High Tensile Grade R Zinc Plated Fully Threaded . Size : 5/16" BSF. Thread Pitch : 5/16" x 22 tpi. Zinc Plated : Rust Prevention. DO NOTE THAT1 1/2" L AND 1 3/4"L AND 2" L ARE NOT SET SCREWS AND ONLY PART THREADED AS PER PHOTO ATTACHED ON VARIATION .
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