A-B11960339SM-AI NUT-HEX FLANGE 3/8-16One New Aftermarket Replacement Hex Flange Nut 3 8 16 This 3 8 16 UNC hex flange nut features an integrated flanged base that acts as a built in washer, distributing clamping load over a greater surface area and eliminating the need for a separate flat washer. The six sided hex profile allows for easy tightening with standard hand tools or a wrench, while the flange bearing surface helps resist loosening under vibration and load making it well suited
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