nut Standard: DIN, ASME, ISO, BS grade: 4.8, 6.8, 8.8 galvanized, black carbon steel and stainless steel nutincluding bolt, nut, washer, screws, threaded rod Standard: DIN, ASME, ISO, BSgrade: 4.8, 6.8, 8.8galvanized, blackcarbon steel and stainless steelCERTIFICATE: ISO9001 nut