Grade 12.9 Socket Head Cap Screw 35CrMo UNC 1/4-20 5/16-18 3/8-16 1/2-13 Black Oxide ASME B18.3

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It's no secret that we are known as experts in the fastener industry and have been since 1912. our devotion to customer service, quality products, and on-time deliveries have propelled us to success since our inception.