supply of hex head screw size: m8x20mm galvanized [hex head screw size: m8x20mm galvanized of grade 8.8 with spring washer & plain washer, grade of plain washer should be is2016 and spring washer should be is3063 all should be galvanized. (hex head screw - 01 nos/set. spring washer - 01 nos/set. plain washer - 01 nos/set.) ]hex head screw size: m8x20mm galvanized [hex head screw size: m8x20mm galvanized of grade 8.8 with spring washer & plain washer, grade of plain washer should be is2016 and spring washer should be is3063 all should be galvanized. (hex head screw - 01 nos/set. spring washer - 01 nos/set. plain washer - 01 nos/set.) ],hex head screw size: m8x20mm galvanized of grade 8.8 with spring washer & plain washer, grade of plain washer should be is2016 and spring washer should be is3063 all should be galvanized. (he x head screw - 01 nos/set. spring washer - 01 nos/set. plain washer - 01 nos/set.) warranty period 30 mo nths from the date of supply. [ warranty period: 30 months after the date of delivery ] ]