The item named by the manufacturer is a filter, zero check, hepa for model 803x
No other part numbers with same form, fit, and function found.
NSN 5990-00-199-0081
NSN 6105-00-025-1797
NSN 5950-01-265-0328
NSN 6320-00-405-2348
NSN 6240-00-671-2281
NSN 6685-01-447-1542
NSN 2925-01-348-8306
NSN 6610-01-065-1073
NSN 5920-01-560-1798
NSN 5965-00-020-1951
NSN 5990-01-392-5682
NSN 6320-00-588-2401