One of the 3 mounting holes 0.313 in.
A toothed wheel whose teeth or sprockets are designed to be engaged with the links of a pitch chain, track, or the like. It is usually used for transmitting power.
Classification: Chain sprockets and parts thereof
NSN 6135-01-038-6225
NSN 6145-00-643-4962
NSN 5985-00-125-7642
NSN 5985-01-367-7063
NSN 7035-01-598-4490
NSN 6610-00-191-5317
NSN 6110-00-175-3661
NSN 6650-00-279-5741
NSN 5996-01-028-6047
NSN 5999-01-030-9717
NSN 6145-01-471-7901
NSN 5935-01-019-4539