ARP 400-8364 Stainless Steel 12-Point Nut Kit M10 x 1.25 Polished Universal

Vehicle Fitment

Universal - no specific vehicle fitment. Suitable for any application requiring M10 x 1.25 replacement or upgrade nuts, including cylinder head studs, main cap studs, intake manifold studs, exhaust manifold studs, wheel studs, accessory brackets, and general engine and chassis fastening applications.

Fitment Notes

• Thread size is M10 x 1.25 right-hand thread - verify your stud or bolt uses M10 x 1.25 before ordering
• Wrench size is 12mm - confirm clearance for a 12mm 12-point socket in your application
• Stainless steel construction is recommended for exhaust, coolant, and other high-heat or high-moisture environments where chromoly nuts may corrode over time
• For the same size in black oxide chromoly (8740 steel), see ARP 300-8364
• For M10 x 1.25 with a small-collar profile for tighter clearance applications, see ARP 300-8363 (chromoly) - no stainless equivalent listed
• All ARP stainless nuts are right-hand thread - confirm thread direction of your application

Features

• Made from ARP Stainless 300 series stainless steel - resists rust, corrosion, and heat discoloration in exhaust and coolant environments
• Rated at 180,000 psi tensile strength - substantially stronger than OEM and standard hardware nuts
• 12-point profile provides better socket engagement in confined spaces compared to standard 6-point hex nuts, reducing rounding risk under torque
• Thick wall construction for maximum strength and rigidity under sustained clamping loads
• Polished finish delivers a clean, show-quality appearance on exposed engine components such as cylinder heads and intake manifolds
• Manufactured to the same quality standards as the nuts included in ARP stud and bolt kits

Specifications

• Part Number: 400-8364
• Material: ARP Stainless 300 Series
• Tensile Strength: 180,000 psi
• Thread Size: M10 x 1.25
• Thread Direction: Right-Hand
• Nut Style: 12-Point
• Wrench / Socket Size: 12mm
• Finish: Polished
• Self-Locking: No
• Fitment: Universal
• Quantity: Set of 10

Included Components

• 10x ARP Stainless 300 M10 x 1.25 12-Point Nuts

Product Description

The ARP 400-8364 is a universal replacement and upgrade nut kit for M10 x 1.25 threaded studs and bolts. ARP's stainless 12-point nuts serve as the correct replacement hardware for any application using M10 x 1.25 fasteners - including head studs, main cap studs, wheel studs, exhaust manifold studs, intake manifold studs, and general accessory mounting. They are also the correct replacement nuts for ARP stud kits specifying M10 x 1.25 hardware, ensuring the full assembly maintains its rated strength and material consistency.

Made from ARP Stainless 300 series material at 180,000 psi, these nuts resist corrosion and discoloration in high-heat and high-moisture environments. The 12-point profile accepts a 12mm socket and provides superior engagement in tight locations compared to standard hex nuts. Sold as a set of 10 polished stainless nuts - no washers included.