bolt and nut 1. DIN, ASME, ISO, EN standard 2. Grade 4. ... .8,S304 3. bolt, nut, washer, screws,threaded rod bolt and nut1. DIN, ASME, ISO, EN standard2. Grade 4.8, 6 ... steel6. Round, hexagonal, square head, stud bolt.7. package: box and pallet. CERTIFICATE: ISO9001 bolt and nut