Shaft Coupler Body Coupling Size L100 Outside Diameter 2 17/32 in Coupling Overall Length 3 1/2 in System of Measurement Inch Hub Material Carbon Steel Maximum Speed 7 000 RPM Horsepower @ 100 RPM 0.66 hp (Buna-N Spider) 1.8 hp (Hytrel Spider) Keyway Depth 1/8 in Keyway Width 1/4 in Bore Diameter 1 in Shaft Locking Type Set Screw Bore Type Round Bore with Keyway Jaw Profile Straight Screw Thread Size 5/16-18 UNC Hub Diameter 2 17/32 in Hub Material Grade 1045