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SKU: 300-8303
ARP 7/16 Inch -20 12pt Nut Kit for 1955+ Chevy Small Block V8 Big Block V8 Ford 289-351W
ARP 300-8303 nut kit delivers 24 precision 12-point nuts in 7/16-20 thread size for ARP connecting rod bolts in Chevy Small Block 262-400 cid V8s from 1955+ Big Block 396-454 cid V8s from 1965+ and Ford 289-351W V8s from 1962+. These nuts provide consistent clamp load under high stress for reliable performance in street strip and track builds. Perfect match for ARP Pro Series rod bolts in high-horsepower applications.
Key Features
- 12-Point Design: Locks onto sockets and wrenches for slip-free torquing and prevents rounding during high-torque assembly
- High-Strength ARP Alloy: Forged steel construction with 200,000 psi tensile strength resists fatigue and maintains clamp load through heat cycles
- Precision Thread Fit: Machined exactly for 7/16-20 ARP rod bolts ensuring full thread engagement and even load distribution
- Kit of 24 Nuts: Complete quantity covers 12-16 connecting rods typical in V8 engines with extras for spares or dual-nut setups
- Reduced Hex Thickness: Allows clearance in tight rod cap areas for easier access in engine blocks
Product Notes
- Confirm rod bolt thread size before ordering to ensure compatibility
- Store in dry conditions to preserve thread integrity between uses
- Compact kit ships quickly with no oversize handling fees
Installation Notes
- Professional installation recommended.
- Clean threads and apply ARP Ultra-Torque lubricant for precise torque readings
- Torque in stages per ARP specs using 5/8 inch 12-point socket follow rod cap sequence
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1955+ | Chevrolet | Small Block V8 | 262 283 327 350 383 400 |
| 1965+ | Chevrolet | Big Block V8 | 396 402 427 454 |
| 1962+ | Ford | Small Block V8 | 260 289 302 351W |
| 1967+ | Chrysler | B/RB Big Block V8 | 383 400 426 440 |
| 1986+ | Chevrolet | Small Block V8 | LT1 Vortec 350 |
Why Choose ARP?
- Decades of leadership in performance fasteners trusted by racers worldwide
- Engineered for extreme loads in NHRA Top Fuel and Pro Stock engines
- Exact tolerances from CNC machining for zero defects and perfect fit
Frequently Asked Questions
-
Q: Which engines use 7/16-20 rod bolts with these nuts?
A: Compatible with ARP rod bolts in Chevy Small Block Big Block Ford Windsor and Mopar B/RB V8s confirm your bolt part number like ARP 235-7001 for SBC -
Q: What material and strength rating do the nuts have?
A: Forged from ARP high-strength alloy steel with 200,000 psi minimum tensile strength and black oxide finish for corrosion protection -
Q: What tools are needed for installation?
A: 5/8 inch 12-point socket or wrench ARP moly lube or Ultra-Torque and calibrated torque wrench follow ARP torque values from 65-85 ft-lbs depending on bolt series
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Secure ARP plastic kit tray in 6 x 4 x 1 inch box
- Weight: 0.3 lbs
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