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SKU: 301-8314
ARP 7/16in 8740 Black Oxide 12-pt Nut Kit (50 Pack)
This ARP nut kit delivers high-strength 12-point nuts for securing critical engine fasteners in performance builds. The 7/16"-20 thread size matches ARP rod bolts and head studs on popular engines including Chevrolet Small Block Big Block GM LS and Ford Windsor. Built to handle extreme loads with 180,000 PSI tensile strength these nuts ensure reliable clamping force under high RPM conditions.
Key Features
- 8740 Chrome Moly Steel: Forged for 180,000 PSI tensile strength to resist fatigue in high-horsepower applications
- Black Oxide Finish: Provides corrosion resistance for long-term durability in engine environments
- 12-Point Design: Allows positive wrench grip to prevent rounding during high-torque assembly
- Thick Wall Construction: Delivers added rigidity and strength for heavy-duty fastening needs
- 50-Piece Kit: Bulk quantity covers multiple rods or studs in complete engine rebuilds
Product Notes
- Confirm 7/16"-20 thread compatibility with your ARP bolts or studs
- Apply ARP Ultra-Torque fastener lubricant for precise torque values
- Store in dry conditions to maintain black oxide protection
Installation Notes
- Professional installation recommended.
- Torque nuts to ARP specifications using a calibrated torque wrench in stages
- Compatible with all ARP 7/16" diameter rod bolts head studs and main studs
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1955-2004 | Chevrolet | Small Block V8 | 262-400 cid |
| 1965-2001 | Chevrolet | Big Block Mark IV/V/VI | 396-502 cid |
| 1997-2020 | Chevrolet/GM | LS Series Gen III/IV | LS1 LS6 LQ4 LQ9 |
| 1962-2001 | Ford | Small Block Windsor | 221-351W cid |
| 1968-1995 | Ford | FE/FT Big Block | 352-428 cid |
| 1962-2004 | Ford | 351 Cleveland/Modified | 351C/M |
Why Choose ARP?
- Trusted by NHRA Top Fuel and NASCAR teams for race-proven reliability
- Manufactured to exacting standards exceeding SAE Grade 8
- Precision CNC machined threads for consistent fit and clamping
Frequently Asked Questions
-
Q: What is the exact thread size and quantity?
A: 7/16"-20 thread with 50 nuts per kit ideal for 8-cylinder rod or head applications -
Q: What material and strength rating?
A: 8740 chromoly steel construction with 180,000 PSI tensile strength and black oxide finish -
Q: Does ARP offer a warranty?
A: Limited lifetime warranty against manufacturing defects when used per ARP guidelines
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Secure factory box
- Weight: 1.1 lbs
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