Shaft, IPTO Drive. PART NO: A-92713C1. Indented on gear end, gear thickness .826". Teeth21 Spline10 , 1.625" Dia. . MODELS: Case-IH TRACTOR: 385 Case-IH TRACTOR: 485 Case-IH TRACTOR: 585 Case-IH TRACTOR: 685 Case-IH TRACTOR: 885 Case-IH TRACTOR: 895 (INDENTED ON GEAR END, GEAR THICKNESS .826") Case-IH TRACTOR: 985 (INDENTED ON GEAR END, GEAR THICKNESS .826") Case-IH TRACTOR: 995 (INDENTED ON GEAR END, GEAR THICKNESS .826").