>> Search results for: 51177B NSN Search Results National Stock Number (NSN) Description 4820-01-121-2457, 4820011212457 SEAT RING,VALVE 4820-01-475-2140 , 4820014752140 Cancelled -> Replaced by 4820010485049 1 Related Inventory 51177-B1-3804820010485049Condition NSSEAT Readily AvailableAdd to RFQ 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