supply of supply of set of items for gauge columnsupply of set of items for gauge column,supply of set of items for gauge column (part finished) for x-class locomotives to the following drawings. item 01: gauge column (part finished lh) for top cock as per drg no goc/x/sk-2-16522, qty-01 no. item 02: gauge column (part finished rh) for top cock as per drg no goc/x/sk-2-16522, qty- 01 no. item 03: gauge column (part finished lh) for bottom cock as per drg no goc/x/sk-2-16520, qty-01 no. item 04: gauge column (part finished rh) for bottom cock as per drg no goc/x/sk-2-16520, qty-01 no. note: 1) item 01 to 04 consists of 01 set. 2) all threads should be as per bsw standards. 3) each i tem should have one integral test piece and is to be parted in presence of railway inspection authority and handed over for inspection before machining [ wa rranty period: 30 months after the date of delivery ] ]