supply of side frame friction liner for casnub 22w (m) bogies to rdso drg. no. sk-69594, alt-38 , item - 7, spec. no. wd-21-casnub-22- nlb bogie-93 rev-2 of july 2002 with amendment no. 6 of july2020. ( manufacturer initial, month & year of manufacture marked by metal laser engraving in 6 mm type & . 1 mm depth minimum on hidden surface) , side frame friction liner for casnub 22w (m) bogies to rdso drg. no. sk-69594, alt-38 , it em - 7, spec. no. wd-21-casnub-22- nlb bogie-93 rev-2 of july 2002 with amendment no. 6 of july2020 . ( manufacturer initial, month & year of manufacture marked by metal laser engraving in 6 mm type & . 1 mm depth minimum on hidden surface) [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]