Jackshaft / Murray 774091MAPack Size:1Murray 774091, Murray 94129, Murray 774091MA, Murray 94129MALaser 97751, NHC 253-6906, Ratio Parts 22-549, Rotary 9906Murray 38"-50" LT rail frame, 46" and 52" GT rail frame and 52" GT old styleOD: 5/8 ", Length: 7 ", Thread: 9/16 "-18 UNF, 1 1/2" OD shoulder