>> Search results for: SS4R3A5H NSN Search Results National Stock Number (NSN) Description 4820-01-492-3177, 4820014923177 VALVE,SAFETY RELIEF 4820-01-661-5265 , 4820016615265 VALVE,SAFETY RELIEF 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