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 6135-01-322-4655
NSN 6135-00-990-1822
NSN 6240-00-107-8192
NSN 6220-00-787-3277
NSN 2925-00-308-0797
NSN 6610-01-204-7281
NSN 5960-00-246-4623
NSN 5905-01-372-1950
NSN 6135-01-205-5965
NSN 5855-01-329-5830
NSN 5975-01-069-2196
NSN 6105-00-399-1352