Chromoly Strength For Critical Fastener Applications
Factory bolts are engineered for cost, not for the loads a built engine bay or high output chassis actually sees. This heat treated 8740 chromoly 12 point bolt is rated at 180,000 psi tensile strength, giving builders a drop in upgrade anywhere a reliable M6 fastener is required.
Key Features
- Heat treated 8740 chromoly construction rated at 180,000 psi tensile strength
- Black oxide finish for corrosion resistance and a clean appearance
- 12 point head design allows a socket to grip more surface area than a hex head
- M6 x 1.00 thread with a 35mm under head length
- 8mm wrenching size for common socket compatibility
- Sold in a pack of 5 bolts
Specifications
| Detail | Value |
|---|---|
| MPN | 670-1004 |
| UPC | Not published by manufacturer |
| Thread Size | M6 x 1.00 |
| Under Head Length | 35mm |
| Head Style | 12-Point |
| Wrenching Size | 8mm |
| Material | 8740 Chromoly |
| Finish | Black Oxide |
| Tensile Strength | 180,000 psi |
| Quantity | 5 bolts per package |
What's Included
- 5 ARP 670-1004 M6 x 1.00 x 35 black oxide 12 point bolts
About ARP
ARP manufactures premium fasteners engineered specifically for high stress automotive and racing applications, using proprietary materials and heat treating processes to deliver tensile strength well beyond standard Grade 8 hardware.
Related Parts on Our Site
- ARP metric bolt kits in additional under head lengths
- ARP black oxide 12 point nut kits
- ARP hex head bolt sets
FAQ
What is this part?It is an ARP M6 x 1.00 x 35 black oxide 12 point bolt made from heat treated 8740 chromoly, rated at 180,000 psi tensile strength and sold in a pack of 5.
What socket size fits this bolt?The 670-1004 uses an 8mm 12 point socket for installation and removal.
How many bolts come in a package?Each package includes 5 bolts.
What is the thread pitch on this bolt?The thread pitch is M6 x 1.00.
What under head length does this bolt have?The under head length is 35mm.
What material is this bolt made from?It is manufactured from heat treated 8740 chromoly steel with a black oxide finish.
Is this bolt stronger than a stock Grade 8 bolt?Yes, its 180,000 psi tensile rating provides a substantial margin over standard Grade 8 hardware.
What is the recommended torque value for this bolt?ARP publishes a general torque value of approximately 11 ft-lbs for M6 x 1.00 fasteners of this style, though final torque should follow the application specific service manual.
Install Instructions
- Clean and inspect the threaded bore before installing the new bolt
- Apply the recommended thread lubricant or ARP fastener assembly lubricant if specified for the application
- Thread the bolt in by hand to avoid cross threading
- Torque the bolt to the application specific torque value using an 8mm 12 point socket
- Recheck torque after initial break in if used in a high vibration location
ARP
ARP (Automotive Racing Products) is the world’s premier manufacturer of high-strength engine and driveline fasteners—head studs and bolts, main studs, rod bolts, and more—engineered and manufactured in-house from start to finish for race-proven reliability. With vertically integrated processes that include cold heading, machining, heat-treating, thread rolling after heat treat, and rigorous QA, ARP maintains aerospace-level certifications (ISO 9001 and AS9100) and validates every part for repeatable clamp load and fatigue resistance. Signature alloys such as 8740 chromoly, ARP2000, L19, and Custom Age 625+ deliver ultimate tensile strengths up to the super-alloy range, while ARP Ultra-Torque fastener assembly lubricant helps achieve consistent pre-load during installation. From street performance builds to professional motorsport programs, ARP fasteners provide precise fitment, superior metallurgy, and the durability needed to keep engines together at elevated cylinder pressures and...
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