Thin Nylon Insert Nuts 5/16-18 10pk

The Thin Nylon Insert Nuts 5/16-18 10pk from ALLSTAR PERFORMANCE are engineered locking fasteners designed for applications requiring vibration-resistant, self-locking connections. These hex head nuts are ideal for mechanics, fabricators, and automotive enthusiasts who need dependable fasteners that stay secure under engine vibration, road shock, and thermal cycling.

Each nut features a nylon insert mechanism that grips the bolt thread without adhesive, allowing for reuse until the nylon wears out. Manufactured from steel and finished with zinc oxide coating, these fasteners offer corrosion resistance suitable for various applications, though care should be taken in highly corrosive environments. The 5/16-18 thread specification delivers the precise fit and load capacity required for engine bay, fuel system, and suspension components.

Professionals and DIY builders rely on these nuts wherever bolt-torque integrity matters—cylinder head work, carburetor mounting, brake line fittings, and exhaust manifold assembly all benefit from nylon-insert locking performance. The compact 3.15 x 0.8 x 4 inch package and 0.09 lb weight make storage and handling effortless. Compatible with all 5/16-18 bolts, these nuts are a versatile addition to any toolbox.