>> Search results for: DEFSTAN391 NSN Search Results National Stock Number (NSN) Description 3940-99-942-4239, 3940999424239 BLOCK,TACKLE 3940-99-942-4237 , 3940999424237 BLOCK,TACKLE 3940-99-942-4234, 3940999424234 BLOCK,TACKLE 3940-99-942-4228 , 3940999424228 BLOCK,TACKLE 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