supply of different items for poh of btpn type wagons.different items for poh of btpn type wagons.,master valve for discharge system of btpn wagon to rdso drg. no. wd-86081-s-6 6 item -5 alt-16 or latest item no. 5. matl.& specn.is:1458/65 & amdt.4 [ warranty period: 30 mont hs after the date of delivery ] ] , valve spindle drg.no.item 10 of.wd-86081/s-61 alt 13. note :this item pertain to bo gie pol tank wagon type (btpn & btpnhs). [ warranty period: 30 months after the date of delivery ] ] , valve operating screw drg. no.item 4 of wd-86081/s-66 alt 14. note :this item pert ain to bogie pol tank wagon type (btpn & btpnhs). atl.& specn. is:6603/2001 gr.07 cr18ni9-soft ened condition [ warranty period: 30 months after the date of delivery ] ] , valve spindle nut bottom for btpn wagon to rdsos drg.no.wd-86081-s-66 alt.16, item no.12. material to is: 6603-2001(reaffirmed-2019), steel designation x07cr18ni9 [ warranty period: 30 months after the date of delivery ] ] , valve seat of discharge system of btpn tank wagon to rdsos drg.no.wd-86081-s -66, alt.16, item no. 2. matl.& specn.is:1458/65, amend.4. [ warranty period: 30 months after the dat e of delivery ] ] , safety valve for petrol tank wagons to irs drg. no. wa/tf-87, alt.nil [ warranty period: 30 months after the date of delivery ] ]