Keyed Shaft, Material 1045 Carbon Steel, Diameter 1 1/2 in, Overall Length 48 in, System of Measurement Inch, Diameter Tolerance +0.000/-0.001 in, End Type Keyed, Keyway Depth 3/16 in, Keyway Length 48 in, Keyway Width 3/8 in, Material Hardness 170, Standards ANSI B17.1-1967, ASTM A-108, ASTM-A29, R1973, Straightness Tolerance 0.012 in/ft, Groove Spacing Not Applicable, Number of Grooves 0