COMP Cams 4603-1 Magnum Polylock Rocker Arm Adjusting Nut for Stud - 7/16

The COMP Cams 4603-1 Magnum Polylock is a high-quality rocker arm adjusting nut designed for 7/16" rocker studs. This precision-engineered component provides secure valve train adjustment with superior locking capability to prevent loosening under high-performance engine conditions.

Key Features:

• Fits 7/16" rocker studs for wide compatibility with most performance engines
• Polylock design combines traditional jam nut security with modern polymer locking technology
• Prevents valve lash from changing during engine operation
• Precision-machined threads ensure smooth adjustment and reliable torque retention
• Durable construction withstands extreme temperatures and vibration
• Easy to adjust—no special tools required for proper valve train setup

The Magnum Polylock nut features an integrated polymer insert that grips the rocker stud threads, maintaining precise valve adjustment while eliminating the need for lock wire or additional locking mechanisms. Ideal for street performance, racing, and high-RPM applications where consistent valve train geometry is critical.