Jaw Coupling Hub Coupling Size L150 Outside Diameter 3 3/4 in Coupling Overall Length 4 1/2 in System of Measurement Inch Hub Material Carbon Steel Maximum Speed 5 000 RPM Horsepower @ 100 RPM 2 hp (Buna-N Spider) 3 hp (Urethane Spider) 5.9 hp (Hytrel Spider) Keyway Depth 1/4 in Keyway Width 1/2 in Bore Diameter 1 7/8 in Shaft Locking Type Set Screw Bore Type Round Bore with Keyway Jaw Profile Straight Compatible Center Element Manufacturer Part Number L150H L150N L150U