supply of modified hard grease nipple , modified hard grease nipple (lubricating nipple for rack and adhesion drive ) complete of x - class l ocomotive as per drawing no.goc/g/sk-2-12976 in assembled condition note: for material specification, the firm has to su bmit nabl accredited lab test certificate along with the material supply [ warranty period: 30 months after the date of delivery ] ] , hard grease nipple for coupling rod-rack drive complete of x - class locomotive as per drawing no.goc/ x/sk-3-16644 in assembled condition. note: for material specification, the firm has to submit nabl accredited lab test certificate al ong with the material supply [ warranty period: 30 months after the date of delivery ] ]