supply of 7/8 (22.2 mm) dia zinc plated/galvanized lock bolts with collar7/8 (22.2 mm) dia zinc plated/galvanized lock bolts with collar,7/8 (22.2 mm) dia zinc plated/galvanized lock bolts with collar (part no.2820) with gri p range 1.25 to 1.5 inches. one set consisting of 1 no. lock bolt & 1 no. collar. the head of the lock bol ts necessarily be marked with manufactures identification. the marking on collar should be done on l ower bottom surface rdso drg.wd-11036-s-01 alt.1 and wd-11036-s-02 alt. nil. spec: base metal- s teel. astm b633 and astm b695 and astm b117 minimum 48 hrs. lock bolt should have hardness in a range of 28-34 hrc and collar have a hardness in a range of 60-80 hrc. [ warranty period: 30 mo nths after the date of delivery ] ] general stores depot izzatnaga, uttar pradesh 29019.00 set