Spur Gear Bore Diameter 1/4 in Hub Diameter 0.36 in Hub Projection 0.31 in Face Width 1/4 in Pitch Diameter 0.5 in Material Steel Pressure Angle 14.5 Degrees Compatible Gear Rack Grainger Part Number 1L887 Compatible Gear Rack Manufacturer Part Number L505-4 Diametral Pitch 24 Keyway No