Water pump packing nut for use on 1924 – 1929 Packard 1st through 6th Series. For use on the following models: 136, 143, 236, 243, 336, 343, 443, 640 and 645. Packard part number 117969, “Motor water pump packing nut, 1st through 6th series”. Material: 12L14 Steel Finish: Natural Thread: 1 1/4-18 Hex: 1 1/2…