>> Search results for: 639320401 NSN Search Results National Stock Number (NSN) Description 4240-01-537-3136, 4240015373136 MASK,OXYGEN 4720-01-537-0662 , 4720015370662 HOSE,AIR BREATHING 4730-01-538-9846, 4730015389846 ADAPTER,STRAIGHT,HOSE TO BOSS 4730-01-538-9455 , 4730015389455 COUPLING,HOSE 4730-01-538-9844, 4730015389844 COUPLING,HOSE 5331-01-540-0879 , 5331015400879 O-RING 4240-01-509-8991, 4240015098991 FACEPIECE,BREATHING EQUIPMENT 5965-01-512-0654 , 5965015120654 HEADSET,ELECTRICAL 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