Company item name--universal lens chuck
No other part numbers with same form, fit, and function found.
NSN 6620-00-908-7497
NSN 5985-00-416-5683
NSN 5925-00-111-1969
NSN 6320-01-629-1277
NSN 5905-00-060-0538
NSN 5925-00-994-7331
NSN 5910-01-265-0214
NSN 6135-01-341-8003
NSN 5998-00-924-5816
NSN 5910-01-604-9544
NSN 6320-01-512-2031
NSN 5910-01-283-6161