bolt Bolt and Nut 1. Material: Steel,Stainless steel, Brass etc. 2. Size: M5- ... ,1/4"-4" 3. Specification: Din, IFI, JI boltBolt and Nut 1. Material: Steel,Stainless steel, Brass etc. 2. Size: M5 ... Address (qingdao Office):NO.2,Tariff-freeZone,Qingdao,Shandong,China. hex bolts and nuts m 20