Supply Of 1)hex Nipple 20 Mm (3/4") As Per Drg. No. Is: 1239 (part-2)-2011(reaffirmed In 2021) Table- 28 Threads Iso7-1(1994), Aisi304c. 2)hex Nipple 25 Mm (1") Bore As Per Drg. No. Is: 1239 (part-2)-2011, Table-28, Threads Iso71, Aisi304 3)hex Nipple 15mm (1/2") For Brake System. As Per Drg.no. Icf Drawing No. Dc/emu-3-5- 032 Item-19, Alt. S/6.