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SKU: 774-1004 | UPC: 672036041663
ARP M12 x 1.50 x 40mm 12-Point Stainless Steel Bolts (774-1004)
ARP 774-1004 M12 x 1.50 x 40mm 12-point stainless steel bolts provide high clamping force and fatigue resistance for engine builds and chassis components in performance vehicles. These bolts fit universal M12 x 1.50 applications including cylinder head studs, main caps, connecting rod bolts, and suspension mounts where 40mm under-head length is required. Precision engineering ensures reliable preload under extreme heat and torque in turbo or supercharged setups.
Key Features
- Thread Specs: M12 x 1.50 with 40mm under-head length and 30mm thread engagement for secure fit in engine and chassis holes
- 12-Point Head: Accepts 14mm socket with high torque grip to prevent cam-over and stripping during installation
- Material Construction: Stainless steel exterior over 8740 chrome moly core delivers 200,000 PSI tensile strength
- Corrosion Protection: Stainless finish resists rust in harsh motorsport conditions up to 1,000°F
- Pack Quantity: 5 bolts per pack allows complete kits for rods, mains, or heads with consistent quality
Product Notes
- Use ARP thread lube for maximum holding power and to prevent galling
- Torque to ARP published specs for your specific engine or chassis application
- Ships in protective retail packaging for damage-free delivery
Installation Notes
- Professional installation recommended.
- Clean all threads thoroughly before applying ARP thread lube
- Re-torque fasteners after initial 100 miles or heat cycles for best retention
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1980-2024 | Various | Performance Engines | Cylinder Heads / Main Caps / Rod Bolts |
| 1980-2024 | Various | Chassis / Suspension | Universal M12x1.50 Mounts |
Why Choose ARP?
- 50+ years developing fasteners for professional racing teams
- 200,000+ PSI tensile strength exceeds OEM hardware limits
- Used in NHRA, NASCAR, and Formula 1 high-stress assemblies
Frequently Asked Questions
-
Q: What socket fits the head?
A: 14mm socket for the 12-point design to deliver full torque without rounding -
Q: Why stainless steel over black oxide?
A: Stainless provides extended corrosion resistance in wet or salty track environments -
Q: How many bolts for a typical engine?
A: 10-16 for mains and rods, 8-12 for cylinder heads depending on design
Shipping & Handling
- Method: UPS or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Protective retail box, 4 x 3 x 1 inches
- Weight: 0.25 lbs
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