buffer spindle with hex. nut drawing no:- rdso/sk-98145 alt. (12) item 7 & 17 specification :- icf/ md/ spec - 252 ( amndt -3 ) (i) supplier should purchase hardware items (i.e. item 17) from tvs or unbrako or gkw or lps only. (ii) guarantee :- guarantee replacement free of cost of such casting which may develop defects within two years from the date of fitment or with in three years from the date of receipt of supply which ever earlier.