35mm, three pegs and the insert is size 3, 10mm black
No other part numbers with same form, fit, and function found.
NSN 5950-01-370-3555
NSN 5920-01-386-8116
NSN 5965-01-178-2367
NSN 5920-01-118-9492
NSN 5950-01-451-0597
NSN 6145-00-161-2004
NSN 6135-01-054-2462
NSN 6620-01-348-1893
NSN 5835-01-606-3086
NSN 5990-00-424-8872
NSN 6220-01-177-8355
NSN 6645-01-546-8145