Rocker Arm Nuts 7/16-20 Sure-Lock Design

The Rocker Arm Nuts 7/16-20 Sure-Lock Design from CROWER represents precision fastening engineered for high-performance engine builds. Designed for use in applications requiring secure rocker arm retention, these nuts prevent vibration-induced loosening during sustained operation. This set of 16 steel fasteners addresses a critical need in engine assembly, where rocker arm security directly impacts valve train reliability and overall engine performance.

Manufactured from hardened steel with a black oxide finish, these 7/16-20 rocker arm nuts feature CROWER's Sure-Lock design—a proven locking mechanism that resists vibration-induced loosening without compromising ease of installation or removal. The Sure-Lock design incorporates a deformed thread section or mechanical locking feature that creates interference fit resistance while maintaining standard thread engagement. The black oxide coating provides corrosion resistance and ensures the fasteners maintain their integrity across engine operating cycles and thermal cycling.

Engine builders, performance enthusiasts, and machine shops rely on CROWER rocker arm nuts for cam drive assembly on small-block and mid-displacement engine platforms. The 7/16-20 thread specification matches OEM and performance rocker arm stud sizes across popular engine families. Installation is straightforward—thread onto prepared studs with standard torque specifications. This 16-piece set provides ample fasteners for complete rocker arm retention on dual-valve-per-cylinder or single-overhead-cam configurations, making it ideal for engine rebuilds, performance upgrades, and race engine assembly where fastener reliability is non-negotiable.