Mr. Gasket Ultra Seal Sure-Lock Rocker Arm Nuts

Mr. Gasket Ultra Seal Sure-Lock Rocker Arm Nuts are purpose-built for performance and racing applications where valvetrain precision is non-negotiable. The patented Sure-Lock design uses socket head set screws to positively lock each rocker arm nut in place, eliminating valve lash drift caused by vibration and thermal cycling — keeping settings exactly where you set them, lap after lap or mile after mile.

Key Features:

• Sure-Lock Set Screw Design — Allen-head set screws deliver a positive lock on every rocker arm nut, providing precise and repeatable valve lash settings that won't back off under load
• Heat-Treated Steel Construction — Manufactured from quality-grade steel and heat-treated for superior strength, engineered to withstand high valve spring pressures and demanding engine environments
• Corrosion-Resistant Finish — Durable plated finish ensures long-lasting reliability under the punishing conditions of both street and competition use
• Complete Kit Packaging — Each kit includes rocker arm nuts with socket head set screws and a hex key wrench for straightforward installation
• Street and Race Ready — Suitable for high-performance street builds and competition racing applications alike, compatible with both stock and performance rocker arms
• Multiple Configurations Available — The product line spans a range of stud thread sizes and shank profiles to accommodate a variety of engine configurations and rocker arm styles

Backed by Mr. Gasket's decades of motorsport heritage — a brand born on the drag strip and now part of the Holley Performance family — the Ultra Seal Sure-Lock line delivers the confidence that your valvetrain geometry will hold under the most extreme conditions. Whether building a weekend warrior or an all-out race engine, these nuts bring professional-grade locking security to any valvetrain assembly.