8 grade High Tensile MS Nuts & Bolts, Corrug ted/spring & Plain Washers. Name o Manufacturer shall be duly embossed on the door of the distri ution. The bolt material, characteristics, size, tooth type, and mechanical. 4 KV Substation of the ratings indicated above. These Distribution Cabinets are to be outdoor type nd to be fabricated out of 2 mm GI sheet steel. The body of the boxes shall have sufficient re- enforcement with suitable size of channels keeping a provision for fixin andle conforming to general. mm (minimum) in length on cable connection side as shown in the drawings. Ga Porcelain Cutouts in 160 KVA / 315 KVA box to protect outgoing circuits. The following data sheets contain dimensional and load information.