supply of door fastenerdoor fastener,door fastener for sliding door for bcnhl wagons as per rdso drg.no.wd-10068-s-18 item 1 k [ warranty period: 30 months after the date of delivery ] ] , door chainless cotter bracket to item -13 of rdso drg. no. wd - 90030 -s-66, alt. 10 and to specn. is: 2062-2011 (ra 2021) with amendt. no. 1 of nov. 12. grade - e250 a also acceptable in place of grade - e250 cu a [ warranty period: 30 months after the date of delivery ] ] , swing door bolt guide to drg. no. w/dw-302. [ warranty period: 30 months after the date of delivery ] ] , swing door bolt eye to drg.no. wd-90030-s-66, alt.10, item no. 8. to specn. is:1875/1992 (r a - 2021) class - 2 with amendment no.2 of nov.1994 [ warranty period: 30 months after the date of deli very ] ]