>> Search results for: Y16731A3 NSN Search Results National Stock Number (NSN) Description 4820-99-215-3016, 4820992153016 VALVE,CHECK 5330-99-391-0028 , 5330993910028 GASKET 4820-99-282-7009, 4820992827009 DISK,VALVE 1 Related Inventory Search You can use this search box to continue searching. Search parameters can include any combination of characteristics, specifications, description, partial part numbers, NSN or other stocking number. Special characters are not needed and are automatically stripped before searching. Do you sell this part? Become part of our growing pool of certified suppliers. Send Information