Jaw Coupling Insert Coupling Size L225 Outside Diameter 4 61/64 in System of Measurement Inch Maximum Speed 4 600 RPM Horsepower @ 100 RPM 3.7 hp Spider Material Buna-N Maximum Torque 2 340 in-lb Parallel Misalignment 0.015 in Durometer Hardness 80A Axial Motion 0.015 in Angular Misalignment 1 Degrees For Minimum Hub Bore 5/8 in Application Close Coupling L-Type Color Black Compatible Hub Manufacturer Part Number L225 Deform Torque 3 498 in-lb Fail Safe Yes