ARP 1/4-20 x 1.000 12pt Black Oxide Bolts

This ARP performance fastener, stud, bolt, tool, or assembly is the 1/4-20 x 1.000 12pt Black Oxide Bolts. Confirm the exact engine or vehicle application, thread size, length, material, strength series, included quantity, installation lubricant, tightening sequence, and current ARP torque specification before ordering.

Key Features

• High-Tensile Steel: Forged 8740 chrome moly construction withstands 180,000 psi tensile strength for extreme loads.
• Exact Sizing: 1/4-20 x 1.000 inch length matches OEM and aftermarket hardware needs perfectly.
• 12-Point Head: Provides secure wrench engagement to prevent stripping during high-torque assembly.
• Precision-Rolled Threads: Formed after heat treatment for deeper engagement and consistent clamp force.
• Black Oxide Finish: Shields against rust and corrosion in oily, high-heat engine bays.
• Made from 8740 chrome moly steel with proprietary heat treatment and black oxide coating for corrosion resistance and fatigue strength.

Fitment

Specifications

What’s Included

One new ARP hardware kits – other in the exact configuration and quantity identified by this listing. Brackets, wiring, air lines, fittings, switches, fasteners, fitting kits, fluids, covers, and accessories are included only when expressly stated for this exact part.

About ARP

Automotive Racing Products manufactures high-performance studs, bolts, nuts, washers, wheel hardware, assembly tools, and installation lubricants for engine, drivetrain, chassis, and racing applications. Thread dimensions, material, preload method, lubricant, torque, and included quantity remain exact-part specific.

Important Disclosures

• California Proposition 65 warning applies. Review the current manufacturer warning before handling or installation.

Related Parts

• Shop all ARP products
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• ARP 01-10 6.6L GM Duramax Diesel Flexplate Bolt Kit

Frequently Asked Questions

How do I confirm the 1/4-20 x 1.000 12pt Black Oxide Bolts fits my application?
Match the exact engine family or vehicle, component location, thread diameter and pitch, under-head length, material, strength series, and every current ARP application note.

Can I reuse the factory torque value with this ARP hardware?
Not automatically. Use ARP’s current instructions for the exact part, material, lubricant, tightening sequence, and preload method. Factory torque values may be based on different hardware and friction.

What is included with this ARP kit?
Only the studs, bolts, nuts, washers, lubricant, and tools expressly listed for this exact part number are included. Verify the required quantity before disassembly.

Installation Instructions

1. Confirm ARP part number 640-1000, the complete application, and every required supporting component before beginning work.
2. Clean and inspect all mating threads and components, then verify thread engagement, length, washers, nuts, lubricant, and required preparation before assembly.
3. Follow ARP’s current tightening sequence, lubricant instructions, torque or stretch method, and any retorque procedure for this exact part.
4. Verify clearance, preload, fastener seating, and normal component operation before returning the vehicle or engine to service.