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 5950-01-647-2620
NSN 6650-01-428-2251
NSN 6610-00-951-4451
NSN 5925-01-413-1638
NSN 6130-00-479-3941
NSN 5920-01-466-4392
NSN 5910-01-156-9037
NSN 6650-00-401-7896
NSN 5920-01-186-6335
NSN 5965-01-012-1065
NSN 6320-01-378-6191
NSN 6610-01-376-9199