Fully Keyed Rotary Drive Shaft Material Carbon Steel Grade 1045 Diameter 3/4 in Overall Length 12 in System of Measurement Inch Diameter Tolerance +/-0.0025 in End Type Keyed Keyway Depth 3/32 in Keyway Length 3/32 in Keyway Width 3/16 in Standards ANSI B17.1-1967 ASTM A-108 R1973 Straightness Tolerance 0.012 in/ft Groove Spacing Not Applicable Number of Grooves 0