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 5990-01-357-6175
NSN 6130-01-634-0603
NSN 6685-01-429-8922
NSN 5950-00-080-5796
NSN 6320-00-701-0437
NSN 5855-00-151-3853
NSN 5910-01-383-9786
NSN 5975-01-446-6074
NSN 5975-00-455-1052
NSN 5996-01-163-1768
NSN 5990-01-443-2931
NSN 5895-01-634-0630