Zetor Tappet Bolt – Product Description

The Zetor Tappet Bolt (also known as a Valve Adjusting Bolt or Rocker Arm Adjusting Screw) is a precision-engineered engine component used to adjust the valve clearance between the rocker arm and the valve stem. Proper valve clearance is essential for efficient engine performance, smooth operation, reduced engine noise, and maximum fuel efficiency.

Manufactured from high-strength hardened alloy steel, the tappet bolt is heat-treated and precision-machined to withstand continuous mechanical stress, high operating temperatures, and repeated valve adjustments. Designed to OEM specifications, it provides accurate adjustment, secure locking, and long service life.

Approximate Dimensions and Measurements

Specification Approximate Measurement

Overall Length 35–50 mm

Thread Diameter M8–M10 (model dependent)

Thread Pitch 1.0–1.5 mm

Adjusting Tip Diameter 4–6 mm

Hex Head Size 12–14 mm

Approximate Weight 20–40 g