Shaft Coupler Body Coupling Size L070 Outside Diameter 1 23/64 in Coupling Overall Length 2 in System of Measurement Inch Hub Material Carbon Steel Maximum Speed 14 000 RPM Horsepower @ 100 RPM 0.07 hp (Buna-N Spider) 0.18 hp (Hytrel Spider) Bore Diameter 7/16 in Shaft Locking Type Set Screw Bore Type Round Bore Jaw Profile Straight Screw Thread Size 1/4-20 UNC Hub Diameter 1 23/64 in Hub Material Grade 1045