Grade：Gr.5.8 Material：Stainless steel 304 Dia.：M6 M8 M10 M12 Length：40 50 60 70 80 100 120 150 200 Surface treatment：Nature

Standard：GB799 Grade：Gr.4.8 Material：Q235 Dia.：M12 M16 Length：100 250 Surface treatment：Zinc Playing

Grade：Gr.8.8 Material：Carbon 35# Dia.：M6 M8 M10 M12 Length：16 20 25 30 35 40 50 60 70 Surface treatment：Black

Sizes may be tailored to meet specific customer requirements