PAI FMT-4996 MACK 20QL330M LOWER STEP MOUNT (CH / CL / CX) HEX but they are otherwise interchangeable

but they are otherwise interchangeable

There is another Pump (23506048) which is practically identical but has a 1

Item 1 in image

PAI EM71500 MACK 62AX172 CONE

PAI EM76230 MACK / NTN HM813843 CONE

PAI FMT-4996 MACK 20QL330M LOWER STEP MOUNT (CH / CL / CX) HEX but they are otherwise interchangeableProduct Details : Select Mack Applications : CH CL CX Models. Lower Step Mount (Item 6 in Drawing). OEM Reference : Mack 20QL330M. See FMT 5739 (20QL331M) for common Upper Step Mount. Please do not hesitate to contact us with your vehicle, engine and or part(s) details to determine if this product is appropriate for a particular engine and or application. PAI Industries : Brand New, Premium Aftermarket ISO9001 Manufacturer Heavily Focused on U. S. A.