This is a A-1695933M1 Fan, 4 Blade PN: 1695933M1Main Description As Following : A-1695933M1 Fan, 4 Blade P.N: 1695933M1 New 4 blade fan has a 18" diameter, 1.625" pilot hole, and 1.75" bolt hole centers.Dim A (1): 18.000" DiameterDim B (2): 1.625" Pilot HoleDim C (3): 1.750" Bolt Hole Centers Found in Section & Models : Cooling Systems > Fan Blades, Massey Ferguson TRACTOR: 365 (SN