supply of fish bolts and nuts for 60 kg to rdso drg. no. t-1899 to alt. 1 with latest alterations if any, confirming to irs specifications no. t-23-67 with corrigendum no. 5 of october 87 to specifications no. t-23 with latest amendmentfish bolts and nuts for 60 kg to rdso drg. no. t-1899 to alt. 1 with latest alterations if any, confirming to irs specifications no. t-23-67 with corrigendum no. 5 of october 87 to specifications no. t-23 with latest amendment,fish bolts and nuts 140x25 mm (60 kg rail) to rdso drawing no. t1899 as per irs specifications irs t 23-67 with corrigendum number 5 of october 1987 to specification no. t-23 with latest alterations and amendment if any up to date.] [ warrant y period: 30 months after the date of delivery ] , fish bolts and nuts for 60 kg to rdso drg. no. t-1899 to alt. 1 with latest alterations if any, confirming to irs specific ations no. t-23-67 with corrigendum no. 5 of october 87 to specifications no. t-23 with latest amendment [ warranty period: 30 months after the date of delivery ]