purchase of coated labyrinths and pressing rings along with their fasteners for dhauliganga power station , upper fixed labrinth ( forged ) a473gr41500astm , drg . no . dha002xx21-206 , hexagon screw m20x90x38 , 21-012 as per part list mat . steel class 8 . 8 iso 4017 , lower moving labrinth ( forged ) a473gr41500astm , drg . no . dha002xx32-202 , hexagon bolt m16x70x38 , 21-018 as per part list mat . steel class 8 . 8 iso 4017 , pressing ring as per sketch attached mat . astm a 240 s41500 , f/90 screw m6x16 , 21-029 as per sketch attached mat . ss , hp- hvof coating of upper fix labyrinth at sl no . 3 ( 03 nos . , each having 2 . 9 sqm coating area ) drg no . dha002xx21-206-01 rev- c as per scope of work at annexure -a , hp- hvof coating of lower moving labyrinth at sl no . 5 ( 02 nos . , each having 2 . 58 sqm coating area ) drg no . dha002xx32-202-01 rev- c as per scope of work at annexure -a