>> Search results for: AS10231 NSN Search Results National Stock Number (NSN) Description 4921-00-134-4706, 4921001344706 MODIFICATION KIT,MAINTENANCE AND 4240-01-311-8119 , 4240013118119 HELMET,WELDER''S 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