Screwing Piece to ICF Drg. No. T- 0- 3- 640 Alt. r/ 18, Item- 2, Matl. & Specn. IS: 2062/ 2011 with Amndt. No. 1 of Nov, 12, Grade- E250 C and Hex head screw M 24 x 130 along with Hex thin nut ( Chamfered ) M24 RH to ICF Drg. No. T- 0- 1- 641 Alt. c/ 4, Item- 20 & 21. Matl. & Specn. As per Drg.