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 5915-01-113-1470
NSN 6645-01-056-9296
NSN 4140-01-371-3700
NSN 5895-01-475-8630
NSN 6135-01-324-7718
NSN 6620-00-421-7509
NSN 5930-00-262-6057
NSN 5975-00-116-3874
NSN 5950-01-432-0242
NSN 5855-01-147-6024
NSN 6145-01-041-9989
NSN 6645-01-199-7553