supply of hsfg bolts with nutshsfg bolts with nuts,hsfg bolts with nuts, plain and dti washer (01 set) of size m20x80mm property clause 8.8 as per annexure v of railways rdso lucknow bs-111 (revision-6) and en: 14399 series. material required from rdso approved firm only and duly inspected by tpi. [ warranty period: 30 months after the date of delivery ] , hsfg bolts with nuts, plain and dti washer (01 each) of size m20x70mm property clause 8.8 a s per annexure v of railways rdso lucknow bs-111 (revision-6) and en- 14399 series. material required fro m rdso approved firm only and duly inspected by tpi. [ warranty period: 30 months after the date of delivery ] , hsfg bolts with nuts, plain and dti washer (01 each) of size m20x60mm property clause 8.8 a s per annexure v of railways rdso lucknow bs-111 (revision-6) and en- 14399 series. material required fro m rdso approved firm only and duly inspected by tpi. [ warranty period: 30 months after the date of delivery ] , hsfg bolts with nuts, plain and dti washer (01 each) of size m16x70mm property clause 8.8 a s per annexure v of railways rdso lucknow bs-111 (revision-6) and en- 14399 series. material required fro m rdso approved firm only and duly inspected by tpi. [ warranty period: 30 months after the date of delivery ]