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Buy the 9/16-18 x 5 1/2" (PT) Hex Head Cap Screws, Fine, Grade 5 Medium Carbon Steel, Plain, USA online from South Coast Fasteners. Also sold as hex bolts. It measures 9/16" diameter, 5 1/2" (PT) length, fine thread, Grade 5 Medium Carbon Steel with a plain finish. A solid choice for fast, repeatable fastening on the jobsite, it is part of our USA Grade 5 Hex Cap Screws line, stocked across industries such as HVAC, Furniture, and Manufacturing.
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