Fully Keyed Rotary Drive Shaft Material Aluminum Diameter 3/8 in Overall Length 24 in System of Measurement Inch Diameter Tolerance +/-0.0025 in End Type Keyed Keyway Depth 3/64 in Keyway Length 3/64 in Keyway Width 3/32 in Standards ANSI B17.1-1967 R1973 Straightness Tolerance 0.012 in/ft Groove Spacing Not Applicable Number of Grooves 0