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Flange nuts have a washered base in order to ensure fasteners remain firmly secure. The washered base helps to spread pressure to a larger surface area, ensuring a secure fit.

Serrated Hex Flange Nut - 3/8-16 - Zinc CR+3 - Case Hardened Steel - UNC - Pkg of 100 - BBI 857260

857260-serrated-hex-flange-nut-3-8-16-zinc-case-hardened-steel-unc-pkg-of-100

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