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 5945-01-382-7834
NSN 5905-01-588-1936
NSN 5965-00-187-5523
NSN 6110-00-205-1778
NSN 5835-00-483-7615
NSN 5835-01-399-5820
NSN 6130-01-314-2913
NSN 6645-01-441-2762
NSN 7035-01-461-9766
NSN 5925-01-537-9049
NSN 6145-01-409-1685
NSN 6610-01-386-4582