Need reliable locknuts that won't loosen under vibration? This 12-pack of 5/16-18 UNC nylon insert hex locknuts has you covered. They're made from quality 304 stainless steel (18-8 grade), which offers great strength and excellent corrosion resistance — perfect for use in damp, outdoor, or marine environments. The hex drive size is 1/2 inch, with nut dimensions of about 0.55 inches point-to-point and 0.36 inches in height. The nylon collar inside grips the bolt threads tightly to prevent backing off due to vibration, making them ideal for automotive, machinery, electronics, construction, and manufacturing applications. They're often called 'stop nuts' or 'elastic stop nuts'. These are aftermarket parts but meet solid standards. Whether you're working on a car, assembling furniture, or tackling DIY projects, having a pack of these on hand ensures secure, long-lasting fastening. RoyceMart stands behind their quality with thorough testing. Keep your assemblies tight and worry-free with these durable stainless steel locknuts!
