SKU: APN12-2
ARP 7/16-20 12pt Nut 9/16 Wrench for Chevy LS Small Block Ford Engines 1955+
ARP 7/16-20 12-point nut with 9/16-inch wrench size secures critical engine fasteners like connecting rod bolts and main studs in high-horsepower builds. Designed for Chevy LS series 1997+, Small Block Chevy 1955-1998, and Ford 289/302/351W engines, this nut handles extreme torque without failure. Engine builders trust it for consistent clamping force in racing and street performance applications.
Key Features
- Thread Size: 7/16-20 matches ARP rod bolts and studs for exact fit and full thread engagement
- 12-Point Design: Provides 12 contact points for faster installation in confined engine bays and reduced rounding risk
- Wrench Size: 9/16-inch hex allows use with common tools while delivering high torque capacity over 200,000 psi tensile strength
- Material: Forged from ARP 8740 chrome moly alloy for superior fatigue resistance in boosted or nitrous applications
- Finish: Black oxide coating resists corrosion and galling during repeated assembly and disassembly
Product Notes
- Sold as single nut for custom engine builds or replacement
- Use ARP Ultra-Torque assembly lube for accurate torque values
- Special order item verify stock before ordering
Installation Notes
- Professional installation recommended.
- Torque to ARP specifications typically 65-80 ft-lbs depending on application
- Compatible with ARP rod bolts part numbers 200-7605 200-7606 and similar 7/16-20 studs
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1997-2013 | Chevrolet | Corvette | LS1 LS6 LS2 LS3 |
| 1998-2002 | Chevrolet | Camaro | Z28 SS LS1 |
| 1969-1998 | Chevrolet | Camaro | Small Block V8 |
| 1955-1998 | Chevrolet | Chevelle | Small Block 283-350 |
| 1964-1995 | Ford | Mustang | 289 302 351W |
| 1962-1996 | Ford | F-100 | Small Block V8 |
Why Choose ARP?
- Proven in NHRA IHRA and NASCAR racing engines for decades
- Strength exceeds OEM fasteners by 2-3 times in critical applications
- Precision CNC machined threads ensure leak-free high-pressure seals
Frequently Asked Questions
- Q: Will this nut fit Chevy LS connecting rods?
A: Yes fits ARP rod bolts in Gen III/IV LS engines 4.8L 5.3L 5.7L 6.0L 6.2L with 7/16-20 threads verify bolt part number - Q: What material and strength rating?
A: Forged 8740 alloy with 200,000+ psi tensile strength and 170,000+ psi yield for extreme power levels - Q: What is the warranty?
A: ARP lifetime warranty against manufacturing defects when installed torqued per instructions
Shipping & Handling
- Method: USPS First Class or UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: Protective poly bag in 4x4x1 inch box
- Weight: 0.05 lbs
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