ARP M10 x 1.25 Locking Flange Nut Kit (10 pack)

This ARP performance fastener, stud, bolt, tool, or assembly is the M10 x 1.25 Locking Flange Nut Kit (10 pack). 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

• 12-Point Flange Design: Ensures positive engagement with sockets and even load distribution across flange surfaces for secure header mounting.
• High-Strength Alloy Steel: ARP proprietary material withstands 200,000+ psi tensile strength for long-term durability in racing conditions.
• Forged from ARP 2000 alloy steel rated over 200,000 psi with black oxide plating for rust resistance and reduced galling.
• Integrated Locking Mechanism: Prevailing torque feature resists back-off from engine vibration and thermal expansion/contraction.
• Precision M10 x 1.25 Threads: Direct replacement for OEM studs on Honda B/D/K-series, Acura, and Subaru EJ applications with exact fit.
• Black Oxide Finish: Provides corrosion protection in harsh underhood environments exposed to moisture and road salt.

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.

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• Shop all ARP products
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Frequently Asked Questions

How do I confirm the M10 x 1.25 Locking Flange Nut Kit (10 pack) 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 200-8683, 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.