Jaw Coupling Hub; 1-3/8" Bore; 2.54" Hub Dia; Jaw Coupling; Hub; Shaft; Finished Bore; Keyway; 2.54" Outside Diameter; 1.375" Length Thru Bore; L100 Size or Series; Set Screw; Sintered Iron; 7000 Maximum Speed; NBR 417 | Hytrel/Bronze 1134 | Urethane 626In-Lbs Torque