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Five polished stainless bolts with twelve-point heads

ARP

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

SKU CH-KVTK-DSZEC

Set of five stainless steel bolts with 3/8-16 thread, 1.250 in length and 12-point heads

  • 3/8-16 thread fits standard automotive applications
  • 250 in length suits common mounting needs
  • 12-point 7/16 in head allows positive tool engagement
  • Stainless polished finish resists corrosion under hood
  • Five-piece set covers multiple fastening points

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.

Highlights

  • 3/8-16 thread fits standard automotive applications
  • 250 in length suits common mounting needs
  • 12-point 7/16 in head allows positive tool engagement
  • Stainless polished finish resists corrosion under hood
  • Five-piece set covers multiple fastening points

Specifications

BrandARP

Questions about this item

Will the 3/8-16 thread bolts generate heat or noise when torqued all day in a garage?

These stainless-steel fasteners are passive hardware; they produce no heat or noise once installed and torqued to spec.

What tools do I need to install the 7/16 in 12-point head bolts?

A 7/16 in 12-point socket or box-end wrench is required to drive the 12-point heads.

Can the 1.250 in long ARP bolts replace original hardware on older engine builds?

Yes, the 3/8-16 thread pitch and 1.250 in length match many legacy applications, but always verify thread engagement and grip length first.

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