Hillman #10 x 32 Stainless Steel Hex Nut (5-Count) in the Hex Nuts department at Lowes.com
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Gulf Coast Fasteners - Nuts
Nut (hardware) - Wikipedia
13 Different Types of Nuts (Mechanical) - and Their Uses [With Pictures & Names] - Engineering Learn
Hex nuts with captive conical spring washer | Hex nuts with integrated locking washer | Locking nuts | Securing and anti loosening elements | Fastening technology | Products | Bossard USA