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 5950-01-457-6409
NSN 5910-00-089-9927
NSN 4140-00-567-9291
NSN 5935-01-563-7108
NSN 6320-01-585-8468
NSN 5960-00-512-9121
NSN 5950-01-409-9232
NSN 2925-01-294-9216
NSN 5996-01-616-9538
NSN 5895-00-968-1488
NSN 5855-00-560-0110
NSN 6645-00-171-7101