Shaft Bolt - 5/16-18 x 1

The T AND D MACHINE Shaft Bolt – 5/16-18 x 1 (Part Number 05131) is a precision fastener engineered for mechanical assemblies requiring exact thread pitch and torque specifications. This rocker arm shaft bolt features a 5/16-18 UNC thread specification with 1.125-inch effective length and a Torx drive head, making it suitable for applications demanding repeatable mechanical engagement and secure load retention across thermal cycling and vibration cycles.

Constructed from steel, this shaft bolt delivers the tensile strength and corrosion resistance required in engine block assemblies, machinery rebuild kits, and precision mechanical systems. The 5/16-18 thread provides balanced clamp load with manageable torque wrench settings, while the Torx head geometry reduces cam-out risk during installation and reduces fastener damage during repeated service cycles. The 1.125-inch length allows precise seating in rocker arm assemblies while maintaining adequate grip length for secure fastening.

Buyers sourcing replacement hardware for engine rebuilds, vintage machinery restoration, or equipment maintenance will find this OEM-specification fastener delivers the dimensional accuracy and material consistency necessary for trouble-free reassembly. The shaft bolt is sold individually, allowing selective replacement of worn or stripped fasteners without purchasing complete kits. Proper torque application per manufacturer specifications ensures consistent performance across extended service intervals.

T AND D MACHINE fasteners are positioned as quality surplus hardware for technicians, rebuilders, and maintenance professionals who require metric-precision components at competitive pricing. Verification of thread pitch compatibility with your specific rocker arm assembly is recommended before purchase to ensure proper installation.