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SKU: 301-8341 | UPC: 672036036836
ARP 3/8 inch-16 12pt Nut Kit pkg of 10 Fits Chevy Small Block 1955+ LS 1997+ Ford 351W
ARP 3/8"-16 12-point nut kit includes 10 high-strength nuts for securing studs in performance engines. Fits Chevy Small Block V8s Chevy Big Block GM LS series Ford Small Block Windsor Ford 351C Mopar wedges. Provides consistent clamping force under high heat and boost for drag racing street builds.
Key Features
- 12-Point Head: Locks onto wrench or socket for full engagement prevents cam-out during high torque assembly
- 8740 Chromoly Steel: Forged construction with 180000 PSI tensile strength handles extreme cylinder pressures
- Black Oxide Finish: Shields against rust and galling ensures smooth repeated torquing cycles
- Precision 3/8-16 Threads: Exact fit on ARP head main rod studs eliminates cross-threading risks
- Kit of 10 Nuts: Matches quantity needs for single engine builds includes spares for adjustments
Product Notes
- Match nut height to stud application verify 0.625 inch tall fits your setup
- Clean threads before assembly for accurate torque readings
- Store in dry area to maintain finish integrity
Installation Notes
- Professional installation recommended.
- Apply ARP Ultra-Torque lubricant to threads and washer faces
- Torque to ARP specs using calibrated wrench 50-70 ft-lbs typical for heads
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1955-2024 | Chevrolet | Small Block V8 | 262 283 302 305 327 350 400 cid |
| 1965-2024 | Chevrolet | Big Block Mark IV | 396 402 427 454 502 cid |
| 1997-2024 | Chevrolet / GM | LS Gen III/IV | LS1 LS2 LS3 LS6 LS7 L92 |
| 1962-2001 | Ford | Small Block Windsor | 221 260 289 302 351W |
| 1969-1997 | Ford | Big Block 385 Series | 429 460 |
| 1969-1974 | Ford | 351 Cleveland | 351C |
| 1962-2024 | Dodge / Plymouth | LA Small Block | 273 318 340 360 cid |
| 1967-1971 | Dodge / Plymouth | Big Block RB/RB | 383 400 426 440 cid |
Why Choose ARP?
- ARP fasteners power NHRA Top Fuel NASCAR Winston Cup winners
- Patented heat treatment process boosts fatigue life beyond competitors
- CNC machined for micron-level tolerances in every thread and face
Frequently Asked Questions
-
Q: Will these nuts fit ARP head studs on my Chevy 350?
A: Yes fits all ARP 3/8-16 head main rod studs on Small Block Chevy including 350 383 stroker builds torque to 65 ft-lbs with lube -
Q: What is the strength rating and material?
A: Made from 8740 chromoly steel rated at 180000 PSI tensile strength minimum ARP Pro Series quality -
Q: Are special tools required for installation?
A: Use 12-point 9/16 inch socket or box-end wrench ARP moly lube and inch-pound torque wrench for best results
Shipping & Handling
- Method: UPS Ground USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Compact plastic tray in cardboard box 4 x 3 x 1 inches
- Weight: 0.10 lbs
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