This is a A-184527M91 Fan, 6 Blade PN: 184527M91Main Description As Following : A-184527M91 Fan, 6 Blade P.N: 184527M91 New 6 blade fan has a 15.5" diameter, 1" pilot hole, and 1.75" bolt circle.Dim A (1): 6 BladeDim B (2): 15.5" DiameterDim C (3): 1" Pilot HoleDim D (4): 1.75" Bolt Circle Crossed From: 1206-6233 , Found in Section & Models : Cooling Systems > Fan Blades, Massey Ferguson INDUSTRIAL/CONSTRUCTION: 2135 (W/ CONTINENTAL GAS ENG.), Massey Ferguson TRACTOR: 135 (W/ CONTINENTAL GAS ENG.), Massey Ferguson TRACTOR: 65 (W/GAS ENG.) Associated Items : New Also A-MH-O-HYDRSYST, A-MH-O-MF2135, A-MH-P-MF2135, A-MH-P-MF32LDR, A-MH-S-MF100LDR, A-MH-S-MF2135I, A-FRM-MH, A-MH-O-HYDRSYST, A-MH-O-MF135, A-MH-O-MF1353CL, A-MH-P-MF135, A-MH-P-MF32LDR, A-MH-S-MF100LDR, A-MH-S-MF135150, A-SMMF27, A-FRM-MH, A-MH-O-HYDRSYST, A-MH-O-MF5065, A-MH-O-MF65, A-MH-O-MF65DSL And : New 15.5", 6 blade radiator fan has a 1" pilot hole, and 1.75" bolt circle. Diameter: 15.5" Mounting Holes: 1.75" centers Pilot Hole: 1"