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 5965-00-111-2073
NSN 6145-01-086-0058
NSN 6240-01-545-8667
NSN 6105-01-277-1269
NSN 5895-01-093-8987
NSN 6320-01-036-2598
NSN 5895-01-344-7909
NSN 6645-01-519-2220
NSN 5915-00-832-9581
NSN 5998-01-627-3138
NSN 5895-01-437-6740
NSN 5945-01-240-4094