EMD part numbers starting 748

7482827	6 1/2 x 12 j/b front cover with truing plug	EMD
7483115	Class f (6 1/2 x 12) backing ring	EMD
748680	Vent protector, locomotive vent valve	EMD
748708	Vent protector, car vent valve, with side plug	EMD

Not listed? Add it yourself.