Jaw Coupling Hub Coupling Size L050 Outside Diameter 1 5/64 in Coupling Overall Length 1 23/32 in System of Measurement Inch Hub Material Aluminum Maximum Speed 18 000 RPM Horsepower @ 100 RPM 0.042 hp (Buna-N Spider) 0.06 hp (Urethane Spider) 0.08 hp (Hytrel Spider) Bore Diameter 5/16 in Shaft Locking Type Set Screw Bore Type Round Bore Jaw Profile Straight Compatible Center Element Manufacturer Part Number L050H L050N L050U Screw Thread Size 1/4 In.-20 NC