ARP AU6.875-10LGB M12-1.25 x 6.875 in. OAL CA625+ Broached Engine Stud Single

Vehicle Fitment

• Universal - M12 x 1.25 thread pitch, 6.875 in. OAL; verify thread pitch and length requirements for your specific engine application before ordering

Fitment Notes

• This is a universal single stud sold individually; confirm thread pitch, OAL, and block/head thread depth are compatible with your application before ordering
• Broached (hex) installation end allows the stud to be driven in with a hex key - no need for a jammed nut during installation
• CA625+ material requires the use of ARP Ultra-Torque lubricant for accurate and consistent torque readings

Features

• Made from ARP Custom Age 625+ alloy - rated at a minimum of 270,000 psi tensile strength, the highest in ARP's fastener lineup
• Threads are rolled after heat treatment for maximum fatigue resistance under repeated high-load cycling
• Centerless ground to near-perfect concentricity for precise alignment and even clamping force
• Broached (hex) installation end enables clean, controlled installation without a jamb nut
• Reusable fastener - does not stretch or deform under rated load unlike OEM torque-to-yield hardware
• Corrosion-resistant CA625+ alloy maintains performance integrity in high-heat engine environments
• Sold individually - ideal for replacing a single damaged stud or completing a custom fastener configuration

Specifications

• Part Number: AU6.875-10LGB
• Material: ARP Custom Age 625+ Alloy
• Tensile Strength: 270,000 psi (minimum)
• Thread Size: M12 x 1.25 (both ends)
• Overall Length (OAL): 6.875 in.
• Installation End: Broached (hex drive)
• Type: Single Stud - Engine Hardware
• Quantity: Sold individually

Included Components

• 1x ARP M12-1.25 x 6.875 in. OAL Custom Age 625+ Broached Engine Stud
• Note: No nut or washer included - sold as stud only

Product Description

The ARP AU6.875-10LGB is a single Custom Age 625+ engine stud designed for builders who need the highest-grade fastener material available in ARP's lineup. At 6.875 inches overall length with an M12 x 1.25 thread pitch on both ends, this stud is suited for applications requiring extended reach in the cylinder head or block. The broached hex tip allows for clean, torque-free installation by hand or hex key - eliminating the risk of over-tightening during installation that can distort threads or induce pre-load before the nut is even applied.

CA625+ alloy delivers a minimum tensile strength of 270,000 psi - substantially stronger than both 8740 chromoly and ARP2000 materials - making it the correct choice for extreme-boost, high-RPM, or competition engine builds where standard-grade fasteners are a known failure point. Sold individually, this stud is ideal as a single replacement or for custom head stud kit configurations where specific lengths or materials are required.