Fastenal 1122157: 5/16"-9 x 1-1/4" Grade a Zinc Finish Hex Head Lag Screw
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Steel hex lag screw with a 5/16"-9 diameter/thread size and 1-1/4" length. It has a hex head and drive, Grade A strength, zinc finish, coarse full threads, a gimlet point, and meets ASME B18.2.1, ASTM A307, and ASTM F1941/F1941M standards. It is a full-bodied threaded bolt used mainly in wood construction; zinc plating retards corrosion in a normal atmosphere.
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