supply of hex head screw (full thread) size: m20x5 [hex head screw (full thread) size: m20x55mm with suitable plain and spring washer grade of screw should be 8.8 or 10.9 and grade of plain washer should be is2016 and grade of spring washer should be is3063, all should be galvanized, plain washer material should be steel. (hex head screw - 01 nos/set. spring washer - 01 nos/set. plain washer - 01 nos/set.) ]hex head screw (full thread) size: m20x5 [hex head screw (full thread) size: m20x55mm with suitable plain and spring washer grade of screw should be 8.8 or 10.9 and grade of plain washer should be is2016 and grade of spring washer should be is3063, all should be galvanized, plain washer material should be steel. (hex head screw - 01 nos/set. spring washer - 01 nos/set. plain washer - 01 nos/set.) ],hex head screw (full thread) size: m20x55mm with suitable plain and spring washer grade of screw should be 8.8 or 10.9 and grade of plain washer should be is2016 and grade of spring washer sh ould be is3063, all should be galvanized, plain washer material should be steel. (hex head screw - 01 nos/ set. spring washer - 01 nos/set. plain washer - 01 nos/set.) warranty period 30 months from the date of su pply. [ warranty period: 30 months after the date of delivery ] ]