SKU: ARPAR9.000-1SB
MPN: AR9.000-1SB
The ARP 1/2 Stud - 9.000 Short Broached w/1.000 Thread is a precision fastening component engineered for critical engine and drivetrain assembly applications where reliability under extreme load is non-negotiable. This chromoly stud serves as a permanent or semi-permanent fastening solution for cylinder heads, intake manifolds, exhaust manifolds, and high-vibration structural connections in both stock and high-performance builds. ARP studs are purpose-built to eliminate fastener failure, stretch, and preload loss in demanding motorsports and heavy-duty environments.
Manufactured from premium chromoly steel and finished in black oxide for corrosion resistance, this stud features a 1/2-inch diameter body with dual thread pitches (1/2-13 and 1/2-20) to accommodate different applications and bolt hole specifications. The 9-inch overall length provides adequate engagement for thick castings and multi-layer assemblies, while the broached design ensures precise thread geometry and consistent clamp load distribution. Black oxide coating protects against rust and oxidation without adding bulk, critical for tight engine compartment fits. The 1.000-inch thread section length balances gripping surface with minimal protrusion, reducing stress concentration at the transition zone where fastener failure typically initiates.
Professional engine builders, transmission specialists, and off-road fabricators rely on ARP studs for universal applications where OEM fasteners have proven inadequate or where repeatable teardown and reassembly is required. The dual-pitch design maximizes compatibility across casting variations and custom head work, eliminating inventory complexity. Installation requires ARP-specification hardened washers and nuts (sold separately) to achieve rated clamp loads; standard hardware will not deliver the engineering margin these studs provide. Ideal for naturally aspirated and forced-induction engines, marine applications, and any assembly experiencing combined thermal cycling and mechanical shock.
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