supply of procurement of hobcm pressure welded grid (screens) for use of track machines , hobcm pressure welded grid (screens) of 80 mm sheive of screen round rod size 16mm with screen size 1905 x 680 as per plasser part no. 200689685 with en19 material hardened 35 to 40 hr c toughened to 30-35hrc case hardened upto 2 mm depth with 50 hrc. minimum service life should be 5 0km.acceptable make : plasser or oil air techniques, or its equivalent. ] , hobcm pressure welded grid (screens) of 80 mm sheive of screen round rod size 16mm with screen size 1905 x1010 as per plasser part no. 200689456 with en19 material hardened 35 to 40 hr c toughened to 30-35hrccase hardened upto 2 mm depth with 50 hrc. minimum service life should be 8 0kms acceptable make: plasser or equivalent. ]