End Washer

The Allstar Performance End Washer (ALL 31033) is a precision mandrel component engineered for crank mandrel kits used in engine balancing and assembly operations. This 0.5-inch ID end washer serves as a critical locating and spacing element in rotating assembly setups, ensuring proper axial alignment and load distribution during crankshaft preparation. Machine shops, engine builders, and performance enthusiasts rely on this component to achieve accurate mandrel concentricity and repeatability across multiple jobs.

Manufactured from hardened steel and finished in black oxide, this mandrel end washer features a 1.5-inch outer diameter that provides stable bearing surface and radial stiffness under load. The black oxide coating offers corrosion resistance and reduces galling during mandrel assembly and disassembly cycles. The 0.5-inch inner diameter bore ensures precise fit on standard mandrel shafts, while the washer's flat profile maintains dimensional consistency essential for balancing accuracy and mandrel repeatability across production runs or multiple applications.

This end washer is ideal for shops running Allstar Performance crank mandrel kits on automotive, marine, and small-block engine applications. Installation is straightforward—the washer simply slides onto the mandrel shaft and seats against the locating shoulder, requiring no special tools or procedures. Proper use of this component ensures mandrel stability, protects bearing surfaces, and maintains the precision necessary for balanced crankshafts. Compatible with standard 0.5-inch mandrel bores, the ALL 31033 is sold individually and is a wear item that may require periodic replacement in high-volume machine shop environments.