supply of item 1) slotted pan head tapping screw-type-c st4.2 x 19-c to is:7173/2018 (ra 2023), bright zinc plated (bzp) to is:1573-86 (ra 2021) to service grade no.2 of tab-2.item 2) nettle fold hardened self tapping sheet metal screws round head no.8 x12 mm type , nettle fold hardened self tapping sheet metal screws round head no.8 x12 mm typeab drg no.gkwor any approved brand class of engine used for poh of icf/irs jesssop mg coaches. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ] , slotted pan head tapping screw-type-c st 4.2 x 19-c to is:7173/2018 (ra 2023), bright zinc plated (bzp) to is:1573-86 (ra 2021) to service grade no.2 of tab-2. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]