SKU: ARPHAP4.500-5
MPN: HAP4.500-5
The 7/16-14 Hex Head Bolt - 4.500 Long is a precision-engineered cylinder head fastener built for demanding engine applications in tactical platforms and motorsport builds. This ARP chromoly bolt is engineered to deliver the clamping force and fatigue resistance required in high-stress environments where standard fasteners fail. Whether you're rebuilding a performance engine, servicing critical machinery, or maintaining tactical vehicle systems, this 4.5-inch hex head bolt provides the reliability professionals demand for long-term durability and safety.
Manufactured from premium chromoly steel and finished with black oxide coating, the 7/16-14 Hex Head Bolt resists corrosion while maintaining superior tensile strength under extreme load cycles. The 7/16-14 thread specification ensures proper engagement with standard cylinder head ports, while the 4.5-inch length accommodates deep-reach applications without bottoming out. Black oxide finish provides both corrosion protection and a professional appearance, while chromoly material delivers higher yield strength than conventional steel—critical for engines experiencing sustained high RPM or boost conditions. The hex head design allows secure installation with standard wrenches and sockets, preventing rounding and ensuring repeatable torque values across multiple service intervals.
Technicians, engine builders, and vehicle maintenance professionals rely on this bolt for cylinder head assembly, intake manifold mounting, and other critical fastening applications where stress concentration demands premium materials. Proper torque sequencing and accurate specifications prevent head gasket failure, coolant leaks, and catastrophic engine damage—reasons why experienced mechanics specify ARP fasteners for rebuilds and repairs. Each bolt is sold individually, allowing users to replace damaged fasteners without purchasing full kits. Installation requires standard hex wrenches and adherence to OEM torque specifications for your specific engine platform.
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