tender for hex head screw m-16 x 60 mm ( property class 10.9 to is:1367 (pt-3)/2017 rev-5) fine pitch, pitchlength 1.5 mm with hexagon nut m-16 & hexagon thin nut m-16 ( property class 10 to is:1367 (pt.-6)/2018 rev-iv) ( unbrako, lps, tuff or tvs make ) along with 2 nos. spring washer b-16 as per is:3063/1994 ( rev-ii).amndt.1.( reff. drg. cg-14053 alt-2, item no. 6, 7, 8, & 13 ) .