SKU: 300-8302
ARP 3/8 Inch -24 12pt Nut Kit (20 Pack) for Chevy LS SBC BBC Engines
ARP 300-8302 nut kit provides 20 precision 12-point nuts with 3/8″-24 threads designed as direct replacements for ARP rod bolts. These nuts fit popular GM performance engines including LS-series Gen III/IV V8s Small Block Chevy 262-400ci and Big Block Mark IV cars trucks and race applications. Built from 8740 chromoly steel these nuts maintain secure clamp load under extreme horsepower and RPM for dependable engine operation.
Key Features
- 12-Point Design: Allows full 12-point engagement with standard socket or wrench for easier installation and reduced rounding risk
- 3/8″-24 Thread: Matches ARP Pro Series rod bolts perfectly for precise threading and consistent preload tension
- 8740 Chromoly Steel: Heat-treated alloy construction withstands high cylinder pressures and repeated heat cycles
- Black Oxide Finish: Resists corrosion and galling during assembly and long-term engine use
- 20 Nut Kit: Complete set covers most V8 connecting rod applications with extras for spares or rebuilds
Product Notes
- Clean all bolt threads thoroughly before assembly to ensure accurate torque values
- Store in original packaging to protect threads from damage
- Ships in compact protective box measuring 5 x 4 x 1 inches
Installation Notes
- Professional installation recommended.
- Apply ARP Ultra-Torque fastener lubricant sparingly to threads and under nut faces
- Torque to ARP-specified values in correct sequence typically 65-80 ft-lbs depending on rod bolt kit
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1997-2024 | Chevrolet / GM | LS-Series V8 | LS1 LS6 LS2 LS3 L92 L99 |
| 1955-2004 | Chevrolet | Small Block V8 | 262 283 327 350 400 ci |
| 1965-1996 | Chevrolet | Big Block Mark IV V8 | 396 402 427 454 ci |
| 1967-2002 | Chevrolet | Camaro / Corvette / Chevelle | Various SBC BBC Engines |
| Various | Ford | Windsor V8 | 289 302 351W |
Why Choose ARP?
- ARP fasteners power NHRA Top Fuel dragsters and NASCAR engines with proven track record since 1968
- Manufactured in USA to exacting standards for repeatable performance in racing and street use
- Extensive testing ensures fasteners exceed OEM strength ratings by wide margin
Frequently Asked Questions
- Q: Does this kit fit my LS engine rod bolts?
A: Yes ARP 300-8302 nuts match 3/8″-24 ARP rod bolts used in Gen III/IV LS engines including LS1 through L99 in Camaro Corvette trucks and more - Q: What material are these nuts made from?
A: Forged 8740 chromoly steel heat-treated hardened and tempered with black oxide coating for maximum strength and durability - Q: What torque specs should I use?
A: Follow ARP rod bolt kit instructions use ARP Ultra-Torque lube and torque in 3-step sequence re-check after 100 miles or heat cycles
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock – ships same or next business day
- Packaging: Secure cardboard box 5 x 4 x 1 inches
- Weight: 0.25 lbs
