Supply Of Hex Head Screw Of Size M 22 X 50 Mm With Hex Head Screw Of Size M 22 X 50 Mm With 3 Mm Dia Hole On Head For Wire Sealing Of Axle Box Cover For Wap-4 Locomotive As Per Is: 1367, Property Clause 8.8. Accepted Make - Unbrako, Tvs, Vif, Dfl, Lps Only. Purchase Proof From Oem Or Authorization Certificate & Test Certificate From Govt. Approved Lab To Be Submitted Along With Material..