Nylon Insert Nuts 5/16-24 10pk

The ALLSTAR PERFORMANCE Nylon Insert Nuts 5/16-24 10-pack (SKU ALL16061-10) is a set of hex-head locking fasteners engineered to prevent vibration-induced loosening in automotive, machinery, and assembly applications. These nylon insert nuts deliver reliable holding power in high-vibration environments where standard fasteners would fail, making them essential for engine builds, suspension work, and equipment assembly.

Each nut features a nylon insert that creates friction against the bolt threads, preventing rotation without requiring additional tools or maintenance. The 5/16-24 thread specification indicates a 5/16-inch diameter with 24 threads per inch—a common size for engine block fasteners, intake manifold bolts, and accessory mounting points. Steel construction with zinc oxide plating provides corrosion resistance and durability across both indoor and outdoor conditions. The hex-head design offers excellent wrench engagement and allows controlled tightening without stripping or cross-threading.

Mechanics, engine builders, and equipment technicians rely on nylon insert nuts for critical fastening points where vibration, thermal cycling, or frequent disassembly could compromise standard fasteners. The ten-count package provides practical coverage for small-to-medium assembly projects or replacement stock. Nylon insert nuts are single-use—once the nylon is seated, the nut should be replaced rather than reused—making this multi-pack ideal for maintenance supply or one-time builds where fastener integrity is non-negotiable.