ARP 301-8400 ARP 301-8400 12 mm x 1.25 Thread 12-Point Chromoly Nuts, Set of 10

ARP 301-8400 12-point nuts are designed for applications requiring dependable threaded fastening and a precise fit. Manufactured from high-strength chromoly steel, these nuts provide a durable solution for automotive, motorsport, and performance vehicle assemblies. The black oxide finish adds a professional appearance while helping support resistance to surface wear during handling and installation.
The 12 mm x 1.25 thread specification is suited for compatible metric studs and fasteners, while the 12-point head allows access with the appropriate 12-point socket. This design can be useful in confined areas where tool positioning may be limited, helping simplify installation and removal when paired with properly matched components. Always verify thread compatibility, stud engagement, and torque requirements before installation.
Each package includes 10 ARP nuts, making it convenient to service multiple fastening points or keep replacements available for future work. The chromoly construction is well suited to demanding environments where consistent fit and reliable fastening performance are important. These nuts are intended for use with compatible ARP or equivalent threaded hardware and should be installed according to the vehicle, component, or fastener manufacturer’s specifications.
For best results, inspect the threads and seating surfaces before assembly, use clean and undamaged hardware, and apply any required lubricant or thread treatment only as specified for the application. The ARP 301-8400 set combines a metric thread profile, 12-point drive design, and durable black oxide finish in a practical package for professional repairs, upgrades, and performance builds.

Features:

• ARP 301-8400 replacement and performance fastening hardware

• 12 mm x 1.25 metric thread specification

• 12-point head design for use with a compatible 12-point socket

• High-strength chromoly steel construction

• Black oxide finish for a durable, low-gloss appearance

• Set of 10 nuts for multi-point installations or replacement needs