Helical Spring Washers Type B M36, Material Spring Steel, Zinc Plated ( Passivated) Conforming To Is:3063. ( Note: Material To Be Procured From C Lw Approved Vendors Only). [ Warranty Period: 30 Months After The Date Of Delivery ] [Quantity Tolerance (+/-): 5 %Age , Item Category : Normal , Total Po Value Variation Permitted: Max 8 Lacs ] ]