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 6240-01-394-5697
NSN 5965-01-197-6924
NSN 5945-00-619-3553
NSN 5975-01-391-7803
NSN 5915-01-301-9597
NSN 7035-01-322-8180
NSN 5925-01-414-6866
NSN 6240-01-333-9430
NSN 5935-01-461-3241
NSN 6240-01-310-7115
NSN 6150-01-577-0377
NSN 5895-00-120-1195