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Buy the 5/16-9 x 1 1/4" Hex Head Lag Screws, Coarse, Stainless Steel 18-8 online from South Coast Fasteners. Also sold as lag bolts. It measures 5/16" diameter, 1 1/4" length, coarse thread, Stainless Steel 18-8. Built for HVAC and metal building assembly, it is part of our Stainless Steel Self-Drilling Screws line, stocked across industries such as Construction, Automotive, and Electrical. The stainless alloy stands up to moisture, chemicals, and salt air.
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