>> Search results for: USN52 NSN Search Results National Stock Number (NSN) Description 6635-01-437-4581, 6635014374581 Cancelled -> Replaced by 6635015563175 6635-01-493-9172 , 6635014939172 TEST SET,ULTRASONIC 6635-01-494-9506, 6635014949506 TEST SET,ULTRASONIC 6635-01-437-4581 , 6635014374581 Cancelled -> Replaced by 6635015563175 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