Stepped Washer For 31030 Pulley

The Stepped Washer For 31030 Pulley from ALLSTAR PERFORMANCE is a precision steel component engineered for high-performance engine building and crank mandrel applications. This stepped washer serves as a critical spacer and locating element in pulley assemblies, ensuring proper alignment and load distribution across rotating components. Builders and engine shops rely on this washer to maintain concentricity and prevent premature wear in demanding automotive and racing environments where tolerances are measured in thousandths of an inch.

Manufactured in steel with a durable black oxide finish, the stepped washer features a 0.5-inch insert inner diameter and a 0.875-inch insert outer diameter, with a maximum outer diameter of 1.25 inches. The stepped design allows the washer to seat firmly on crank mandrels while accommodating the specific bore geometry of compatible pulleys, preventing lateral shift during engine operation. Black oxide coating provides corrosion resistance and reduces galling when tightened against other steel surfaces, extending component life in both street and racing applications.

This washer is essential for builders installing the ALL 31030 pulley or compatible crank-driven accessories on small-block and mid-size engines. Proper seating of the stepped washer ensures balanced pulley operation, reduces vibration, and protects bearing surfaces from axial loading. Installation requires hand-tightening only—over-torquing can damage the washer or underlying components. Sold individually, so buyers assembling complete pulley systems should order the quantity matching their cylinder count or application requirements.