supply of set of fully threaded hex head bolt, size: m16 x120 mm, grade-10.9 with one hex nut, one spring washer and one plain washer for rail guard. bolt: as per specifications: generally conforming to is:1364, iso 4014 / 4017, threads: iso metric 6g as per is: 4218, property class 10.9 as per is: 1367. nut: as per specification: nuts with metric threads is: 1364, iso 4032, threads: iso metric 6h as per is: 4218, iso 261, iso 965, property class 10 as per is 1367, iso 898, part-ii. spring washer as per specification: generally conforming to din 127b, is: 3063 & bs 4464. plain washer as per specification: generally conforming to is: 2016. make: tvs / lps / unbrako / dfl [ warranty period: 30 months after the date of delivery ]