SKU: 612-1250 | UPC: 672036015701
ARP 5/16 Inch -18 x 1.250 12pt SS Bolts (5/pkg)
ARP 5/16″-18 x 1.250″ 12-point stainless steel bolts come in a pack of 5 for critical fastening in performance engines and components. These bolts fit a range of automotive applications including valve covers, exhaust headers, intake manifolds, and brackets where precise clamp load matters. Built to handle high torque and vibration for long-term reliability in street, drag, and track use.
Key Features
- 12-Point Head Design: Offers 12 contact points to prevent cam-out, enables higher torque in tight spaces, and fits standard 12-point sockets for quick installation
- Stainless Steel Construction: Resists corrosion from moisture, fuels, and exhaust gases while maintaining strength in harsh engine bay environments
- Precision-Rolled Threads: Provides maximum thread engagement, consistent torque accuracy, and resistance to fatigue under repeated heat cycles
- Engineered Clamp Load: Delivers uniform pressure to seal gaskets and components effectively, reducing leaks in high-performance setups
- Pack of 5 with Guide: Convenient quantity for common jobs, paired with ARP torque sequence and lube instructions for proper setup
Product Notes
- Inspect bolt length and thread pitch match your mounting holes before use
- Apply ARP Ultra-Torque lubricant on threads and under heads for accurate torque
- Packed in protective sleeve, weighs 0.25 lbs total for lightweight shipping
Installation Notes
- Professional installation recommended.
- Clean mating surfaces and threads free of debris or old sealant
- Requires 12-point socket. torque per ARP specs (typically 25-30 ft-lbs dry, adjust with lube)
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| ALL | Various | Performance Engines | Valve Covers, Headers, Brackets |
Why Choose ARP?
- ARP fasteners power wins in NHRA, NASCAR, and endurance racing worldwide
- Manufactured with exacting tolerances from premium materials
- Over 50 years refining fasteners for extreme duty in motorsports
Frequently Asked Questions
- Q: What engine components use these 5/16″-18 x 1.250 bolts?
A: Common in valve cover hold-downs, exhaust manifold fasteners, carburetor mounts, alternator brackets, and custom intake setups across V8s, inline engines, and imports - Q: What makes these stainless steel bolts different?
A: ARP premium stainless resists rust better than alloy steel, holds 150,000+ psi tensile strength, and retains threads after multiple removals - Q: Is there a warranty or return policy?
A: ARP stands behind products with satisfaction guarantee. re-torque after 100 miles or heat cycles, contact for torque charts
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock – ships same or next business day
- Packaging: Original ARP sleeve in 4 x 3 x 1 inch box
- Weight: 0.25 lbs
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