Adjuster - 5/16 Dia. Cup - 7/16-20 Thread

The Adjuster - 5/16 Dia. Cup - 7/16-20 Thread by T AND D MACHINE is a precision-engineered fastening component designed for high-performance engine builds and valve train modifications. This adjuster serves as a critical link in rocker arm assemblies, allowing mechanics and engine builders to fine-tune valve clearance and optimize valve timing geometry. Whether you're tuning a street performance engine or preparing a competition build, this cup-style adjuster delivers the repeatability and accuracy required for proper valve train operation and longevity.

Manufactured to strict tolerances, the 5/16-inch diameter cup provides a stable seating surface for rocker arm contact while the 7/16-20 thread specification ensures secure installation and minimal risk of loosening under engine vibration. The compact design—measuring 2.9 inches in length with a 0.5-inch cup width—integrates seamlessly into tight engine bay environments without sacrificing adjustability. T AND D MACHINE's reputation in the automotive aftermarket reflects their commitment to material quality and dimensional accuracy, critical factors when dealing with valve train components where even minor deviations can affect compression ratios, cam timing, and overall engine performance.

This adjuster is ideal for small-block and mid-sized engine platforms using rocker arm assemblies with corresponding cup geometry. Technicians rebuilding classic muscle cars, hot rods, or modern performance engines frequently specify T AND D MACHINE adjusters when restoring or upgrading valve trains. Installation requires proper torque specification and careful valve lash measurement to ensure consistent performance across all cylinders. The lightweight construction (0.04 lbs) minimizes inertia effects on valve response, making it suitable for high-RPM applications where valve train stability directly impacts reliability and horsepower delivery.