supply of rivet and screwrivet and screw,rivet flat head aluminium to emd part no. 9440188 and dlw part no. 19340450 as per dra wing number 9440188 or latest. drawing attached. note: to be procured from past proven suppliers of simi lar items only. test certificate (tc) and guarantee certificate (gc) is also required from the supplier. [ warr anty period: 30 months after the date of delivery ] ] , rivet flat head aluminium to emd part no. 9440189 and dlw part no. 19340047 as per dra wing number 9440189 or latest. drawing attached. note: to be procured from past proven suppliers of simi lar items only. test certificate (tc) and guarantee certificate (gc) is also required from the supplier. [ warr anty period: 30 months after the date of delivery ] ] , rivet round head aluminium to emd part no. 101890 and dlw part no. 19340461 as per dr awing number 101890 alt b or latest. drawing attached. note: to be procured from past proven suppliers o f similar items only. test certificate (tc) and guarantee certificate (gc) is also required from the supplier. [ warranty period: 30 months after the date of delivery ] ] , screw plain head (1/4-20x3/4) emd pt. no. 10563602 [ warranty period: 30 months aft er the date of delivery ] ] , screw 8-32x3/8 for hhp loco control stand. drg. no:-emd pt. no. 10574299. [ warranty peri od: 30 months after the date of delivery ] ]