supply of socket counter screws of different sizes.socket counter screws of different sizes.,socket counter sunk screw, part no. m20x100. threads: as per is-4218. specification: din- 7991 is-6761. mechanical properties: is-1367. property class 12.9. make: tvs, lps, unbrako. (as per poli cy on procurement of spares for track machines). [ warranty period: 30 months after the date of deliver y ] ] , socket counter sunk screw, part no. m12x60. threads: as per is-4218. specification: din-7 991 is-6761. mechanical properties: is-1367. property class 12.9. make: tvs, lps, unbrako. (as per polic y on procurement of spares for track machines). [ warranty period: 30 months after the date of delivery ] ] , socket counter sunk screw, part no. m12x90. threads: as per is-4218. specification: din-7 991 is-6761. mechanical properties: is-1367. property class 12.9. make: tvs, lps, unbrako. (as per polic y on procurement of spares for track machines). [ warranty period: 30 months after the date of delivery ] ] , socket counter sunk screw, part no. m12x70. threads: as per is-4218. specification: din-7 991 is-6761. mechanical properties: is-1367. property class 12.9. make: tvs, lps, unbrako. (as per polic y on procurement of spares for track machines). [ warranty period: 30 months after the date of delivery ] ] , socket counter sunk screw, part no. m12x80. threads: as per is-4218. specification: din-7 991 is-6761. mechanical properties: is-1367. property class 12.9. make: tvs, lps, unbrako. (as per polic y on procurement of spares for track machines). [ warranty period: 30 months after the date of delivery ] ] , socket counter sunk (csk) allen grooved head cap screw with single nut and spring washer, size: m16x55 mm. specifications as per annexure-ii. make- tvs or unbrako or lps or equivalent. [ warra nty period: 30 months after the date of delivery ] ] , socket counter sunk (csk) allen grooved head cap screw with single nut and spring washer, size: m16x70 mm. specifications as per ann