supply procurement of female contact ( suitable for 145 kv eastland make isolator ) copper bond , rotating contact head ( suitable for 145 / 245 kv eastland make isolator ) and sf-6 gas for maintenance work at 220 kv s / s barahuwa under etd-ii , gorakhpur , female contact suitable for 145 kv eastland make sdf type 1600 amp. isolator made of gun metal and having nickle coating. the female contact must be type test 2000 amp. from approved lab as per relevant iss : 5561 / 1970 ( as per sample or as per drawing given by supervising engineer ) , copper bond made of copper strained flexible type of size ( 50x400x10mm ) having provision to connect 16 mm nut bolt on both side with 02 nos. stainless steel nut bolt ( 12x40 mm ) for eastlad make isolator. ( as per sample or as per drawing given by supervising engineer ) , rotating contact head complete suitable for 245 / 145 kv eastland make sdf type 1600 amp. isolator made of gun metal. the rotating head must be type test 2000 amp. from approved lab as per relevant iss : 5561 / 1970 ( as per sample or as per drawing given by supervising engineer ) , copper bond made of copper strained fluxible type of size ( 50x250x10mm ) having provision to connect 16 mm nut bolt on both side with 02 nos. stainless steel nut bolt ( 12x40 mm ) for havellum make. ( as per sample or as per drawing given by supervising engineer ) , supply of sulfur hexafluoride ( sf6 ) gas. ( cylinedershall be provided by department )