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SKU: 300-8305
ARP 9/16in -18 12pt Nut Kit for Chevrolet Small Block V8 1955-2004 Chevrolet Big Block V8 1965-1996
ARP 9/16"-18 12-point nut kit provides high-strength fastening for connecting rod bolts in performance engine builds. Designed for Chevrolet Small Block and Big Block V8 engines along with compatible Ford and Mopar applications this kit ensures secure clamp load under extreme conditions. Enthusiasts rely on it for street strip and track reliability with fatigue-resistant construction.
Key Features
- ARP 8740 Chromoly Steel: Heat-treated alloy resists fatigue and maintains clamp load through thousands of cycles
- 12-Point Design: Allows precise wrench engagement and higher torque without rounding or stripping
- Thread Size 9/16"-18: Matches ARP Pro Series rod bolts for aftermarket H-beam and I-beam rods
- Kit of 8 Nuts: Complete set for one engine with 0.825-inch height for proper rod cap clearance
- Black Oxide Finish: Corrosion-resistant coating extends service life in harsh engine environments
Product Notes
- Pair with ARP rod bolts like 260-5000 series for full assembly
- Inspect threads for damage before reuse after disassembly
- Small lightweight part ships via envelope or small box
Installation Notes
- Professional installation recommended.
- Clean all threads and apply ARP Ultra-Torque lubricant on nut threads and underside
- Torque to ARP specifications typically 75-85 ft-lbs in 3-step sequence recheck after heat cycles
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1955-2004 | Chevrolet | Small Block V8 Engines | SBC 350 383 Stroker |
| 1965-1996 | Chevrolet | Big Block V8 Engines | 396 454 Mark IV |
| 1969-1995 | Ford | 351 Windsor V8 | Mustang Cleveland |
| 1968-1976 | Ford | 460 FE V8 | F-250 Truck |
| 1967-1971 | Plymouth | 440 RB V8 | Road Runner |
Why Choose ARP?
- Proven in NHRA IHRA and NASCAR racing for decades
- Exclusive thread rolling process for smoother engagement and strength
- Extensive testing ensures performance beyond OEM fasteners
Frequently Asked Questions
-
Q: Will this fit LS engines?
A: Yes for aftermarket stroker rods with 9/16-18 ARP bolts like Eagle or Callies H-beam sets not stock LS rods -
Q: What material are the nuts made from?
A: 8740 chromoly steel with exclusive ARP heat treatment and black oxide finish for durability -
Q: What is the torque spec and warranty?
A: Follow ARP instructions 75-85 ft-lbs with Ultra-Torque backed by ARP lifetime warranty against failure
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Compact protective box 4 x 3 x 1 inches
- Weight: 0.10 lbs
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