This Peterson Fluid Systems short spline drive cap kit includes a short drive cap with 0.50" (1/2") spline length, a nut, and a 2.250" outside-diameter washer. It’s a compact drive cap assembly intended for spline-drive applications where a short spline engagement is required; the kit ships ready to install and simplifies spline cap replacement without additional machining.
Peterson Fluid Systems Drive Washer Cap Nut 2.250