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 6620-01-391-9829
NSN 5835-00-770-2843
NSN 6620-01-142-0084
NSN 5895-00-999-5034
NSN 7035-01-049-6776
NSN 7035-01-617-0072
NSN 5999-01-303-6866
NSN 5998-01-541-5073
NSN 2925-01-113-6904
NSN 5996-01-192-8606
NSN 5996-00-823-8895
NSN 4140-01-463-8749