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Five black oxide chromoly bolts with 12-point heads

ARP

ARP Universal Bolt 3/8-16 Thread 1.750 in Chromoly 5 pc

SKU CH-K0AK-3KR1P

Five chromoly bolts with 3/8-16 threads, 1.750 in length and 12-point heads

  • Chromoly construction resists stretching under high loads
  • 12-point 3/8 in head allows precise socket engagement
  • 3/8-16 thread fits many engine and driveline applications
  • 750 in length suits a range of component thicknesses
  • Black oxide finish adds corrosion protection for workshop use

ARP Universal Bolt Set

This five-piece set supplies 3/8-16 thread bolts measuring 1.750 inches in length with a 12-point head design. Manufactured from chromoly steel and finished in black oxide, the fasteners are built for high-stress automotive applications. ARP has produced racing and performance hardware since 1968.

Suits engine and driveline assembly

Mechanics and builders assembling cylinder heads, connecting rods, exhaust manifolds or oil pans will find the thread pitch and length match common OEM and racing specifications. The chromoly construction handles elevated clamp loads without stretching. Shops needing metric threads, longer shanks or larger head sizes should select a different kit.

Verify thread pitch and length

Confirm the 3/8-16 thread pitch and 1.750 inch under-head length match the component you are fastening. Check that a 12-point socket or wrench is available for installation. Ensure the material and finish are compatible with the surrounding hardware and lubrication plan.

Highlights

  • Chromoly construction resists stretching under high loads
  • 12-point 3/8 in head allows precise socket engagement
  • 3/8-16 thread fits many engine and driveline applications
  • 750 in length suits a range of component thicknesses
  • Black oxide finish adds corrosion protection for workshop use

Specifications

BrandARP

Questions about this item

What thread pitch matches the 3/8-16 bolts in this ARP set?

These bolts use a 3/8-16 thread pitch, so any mating nut or tapped hole must be cut to the same 16 threads per inch specification.

Will the 12-point heads on these chromoly bolts fit the same sockets I use on standard hex bolts?

No, the 12-point heads require a 12-point socket or wrench; a standard 6-point hex socket will not engage the fastener correctly.

How can I confirm the bolts are the correct 1.750 in length after installation?

Measure from the underside of the 12-point head to the tip of the threads; the grip length should read 1.750 in when the bolt is seated.

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