Shaft Collar Industry Standard Size N06 Bore Thread Size 1.173 in - 18 TPI Nut Outside Diameter 2 in Face Diameter 1 1/2 in Nut Width 1/2 in Bearing Face Maximum TIR 0.0005 in Nut Material Carbon Steel Nut Material Grade 1215 System of Measurement Inch Resistance Properties Corrosion Resistant Screw Location from Center 0.77 in Screw Material Alloy Steel Maximum Operating Temperature 350 Degrees F Minimum Operating Temperature -40 Degrees F