There is an insert with part number 51183
No other part numbers with same form, fit, and function found.
An item made of material having elastic properties. it may have rigid mounting facilities such as a flange(s), sleeve(s), stud(s) or the like. it is designed to isolate or dampen shock and/or vibration of a continuous or intermittent origin and serve as a support for a weapon system component to be isolated. excludes mount, resilient, general purpose; spring (as modified); bumper, nonmetallic; bumper, rubber; bushing, nonmetallic; hydraulic and pneumatic shock absorbers, dash-pots, grommets, and shock pads.
Classification: Parts of armored fighting vehicles,motorized, whether or not fitted with weapons
NSN 5960-01-267-6139
NSN 5935-01-587-3410
NSN 6645-00-833-2395
NSN 5835-00-092-1136
NSN 6150-01-103-8028
NSN 6145-01-003-9741
NSN 5935-01-571-7910
NSN 5930-01-629-6053
NSN 6620-00-106-3350
NSN 7035-01-119-6271
NSN 6240-01-400-3424
NSN 5930-00-166-0361