S/S Bolt Kit - 12pt. (5) 5/16-18 x 3.750

The ARP Stainless Steel Bolt Kit – 12pt. (5) 5/16-18 x 3.750 is a premium fastener set engineered for demanding mechanical and assembly applications where corrosion resistance and precision fit are non-negotiable. This five-piece kit delivers ARP's proven quality in stainless steel construction, ideal for engine rebuilds, high-performance builds, and field-critical equipment assembly where material integrity directly impacts reliability and longevity.

Each bolt in this ARP kit features a 5/16-18 thread pitch with a 3.750-inch length and 3/8-inch 12-point head design, allowing compatibility with both standard and metric socket configurations common in motorsports and industrial fastening. Stainless steel construction resists rust and corrosion across a wide range of environmental conditions—from marine salt air to harsh outdoor storage—while maintaining bolt preload integrity critical for engine bay assembly and structural applications. The 12-point head geometry provides superior grip engagement compared to traditional 6-point designs, reducing fastener rounding and improving torque control during installation and service.

This kit serves technicians, engine builders, off-road operators, and equipment maintenance crews who require corrosion-resistant fasteners for long-term durability in unforgiving conditions. Whether securing engine components during a full rebuild, assembling auxiliary equipment in field environments, or replacing fasteners in salt-exposed applications, this five-piece set ensures consistent performance without material degradation. ARP's reputation for precision manufacturing means each bolt meets strict tolerances, supporting reliable torque sequencing and even load distribution across critical joints.

Stainless steel bolts have become the standard in professional engine work and marine applications because they eliminate corrosion-related failures that compromise assembly integrity over time. The ARP 5/16-18 specification is commonly encountered in block, head, and accessory mounting, making this kit a practical addition to any serious technician's fastener inventory for planned maintenance and emergency field repairs.