MIDWEST FASTENER CORP 34133 Nylon Insert Lock Nut 5/16"-24 Steel Black Chrome 6

MIDWEST FASTENER 34133 Lock Nuts

These MIDWEST FASTENER 34133 nuts use a nylon insert to resist loosening under vibration and torque. The 5/16"-24 thread fits matching bolts or studs in automotive and general hardware assemblies. A black chrome finish provides corrosion resistance and a uniform appearance. The pack contains six pieces for small jobs or spares.

Mechanics and DIYers needing vibration-resistant

The nylon insert gives reliable prevailing torque without permanent thread damage, so the nuts can be removed and reused a few times. Builders who need a high-temperature locking method or a prevailing-torque nut rated for repeated reassembly should look at all-metal alternatives. Applications requiring a different thread pitch or diameter will need another part number.

Six-piece pack for light-duty use

Six nuts cover a single repair point or a small project with a few spares left over. The nylon insert works well at normal operating temperatures but loses grip above its melting point, so high-heat zones such as exhaust manifolds are outside its comfortable range. Larger jobs or preventive maintenance stocks will require multiple packs.