>> Search results for: CIAC421 NSN Search Results National Stock Number (NSN) Description 3770-99-978-3332, 3770999783332 HOOK,SWINGLETREE,NE 3770-99-978-3331 , 3770999783331 HOOK,SWINGLETREE,OF 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