Bolt Kit - 12pt. (5) 3/8-16 x 1.500

The ARP Bolt Kit – 12pt. (5) 3/8-16 x 1.500 is a five-piece fastener set engineered for high-reliability applications where chromoly strength and consistent thread specification are non-negotiable. Built from premium chromoly material with black oxide finish, these 3/8-16 bolts deliver the corrosion resistance and structural integrity demanded in mechanical assembly, motorsport, and equipment restoration work. The 12-point head design distributes load across a larger contact surface, reducing fastener slip during installation and tightening.

Each bolt measures 1.5 inches in length with a 3/8-inch diameter and M16 thread pitch, making the set suitable for structural repairs, engine block assembly, transmission work, and frame-critical fastening. The chromoly composition provides superior tensile strength compared to standard steel, critical when vibration, thermal cycling, or high-load conditions are present. Black oxide coating offers moderate corrosion protection and reduces galling during installation. The 12-point head accommodates both standard socket and wrench sizes, providing flexibility in field or shop environments where tool variety may be limited.

This five-piece kit addresses the common need for replacement fasteners in equipment maintenance and restoration. Users working on off-road vehicles, powersports applications, firearms component assembly, and general mechanical work benefit from having a verified set of matched fasteners on hand. The universal design means these bolts integrate into any assembly system accepting 3/8-16 metric specifications. Whether performing preventive maintenance, replacement work, or assembly of custom builds, the kit provides consistency without the need to source individual fasteners.

ARP specializes in fastener engineering for high-stress applications, and chromoly bolts with black oxide finish remain industry standard for components subject to load variation and environmental exposure. The 3/8-16 x 1.500 specification is common across powersports, automotive, and equipment sectors, making replacement and future sourcing straightforward for long-term builds and maintenance schedules.