ARP Universal Bolt 3/8-16 Thread 1.250 in Long Stainless 5 pc

Universal Bolt Set

This ARP bolt set contains five stainless steel fasteners with a 3/8-16 thread pitch and a 1.250 inch length. Each bolt features a 12-point head design measuring 7/16 inches across the flats. The polished finish provides corrosion resistance suitable for automotive and marine environments. The kit is intended for enthusiasts and mechanics who require reliable replacement hardware for engine, driveline or accessory mounting.

Sustained Load Behaviour

The stainless steel construction maintains clamping force under continuous vibration and thermal cycling common in racing and high-performance applications. ARP has manufactured fastener hardware since 1968 for series including Formula 1, IndyCar, NASCAR and NHRA drag racing. The material resists galling and stress corrosion during extended service intervals. These bolts are designed to retain preload where standard hardware might stretch or loosen over time.

Upgrade Context

This set replaces worn, corroded or lower-grade original equipment bolts in universal locations requiring a 3/8-16 thread. The jump is worth it when reassembling critical joints where fastener integrity directly affects sealing or alignment. Builders who need a different thread pitch, length or head style should select a kit matching those exact specifications. The part number 615-1250 identifies this specific configuration for repeat ordering.