Product Description Specifications Documentation P8S Standard Duty Shaft, 1/2in diameter x 1-1/2in long made from 4142 hardened alloy with an 1/8in keyway and a #10-32 end tap.This shaft will only work in a P8S Standard Duty gearbox with a P8S Standard Duty Front Block. Diameter: 1/2 in Length (From Face): 1-1/2 in Keyway: 1/8 in End Tap: #10-32 Material: 4142 Hardened Alloy Click arrow in center of image to load and interact with it Your browser does not support iframes.