zinc bolt & screw 1.With GB,DIN,ANSI,ISO,AS standard,ect 2. ... on your requireme zinc bolt & screw1. produce: White zinc bolt & screw 2.size: m6-30x20-250mm 3. certificate:ISO9001:2000 4 ... widely used in aerospace, automobiles, motorcycles, agricultural machinery, construction, transportation, electric power, electronics, chemicals, and home appliances, military industry and other ...