ARP 3/8 -24 12pt Rod Bolt

This ARP performance fastener, stud, bolt, tool, or assembly is the 3/8 -24 12pt Rod Bolt. 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

• ARP2000 Alloy: Forged chrome-moly steel rated at 220,000 psi tensile strength resists stretch and fatigue in high-horsepower applications.
• Precise Sizing: 3/8-24 UNF thread with 1.850-inch underhead length matches OEM B-Series rod holes exactly.
• ARP2000 proprietary alloy with 220,000 psi tensile 185,000 psi proof load exceeds OEM by double.
• 12-Point Head: Provides secure wrench grip to prevent cam-out during high-torque installation on rod caps.
• Rolled Threads: Increases thread shear strength by 30 percent over cut threads for longer service life.
• Black Oxide Finish: Resists corrosion in fuel-soaked engine bays while maintaining fastener integrity.

Fitment

Specifications

What’s Included

One new ARP hardware – single 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.

Related Parts

• Shop all ARP products
• ARP 1/2 x 6.5in Long Broached Individual Stud
• ARP 1/2in -20 12pt Nut (Single Nut)
• ARP 1/2in x 5.250in Long Broached Allen Head Stud (Single Stud)

Frequently Asked Questions

How do I confirm the 3/8 -24 12pt Rod Bolt 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 3AJ1.850-2C, 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.