Helical Spring Washers Type B M8, Material Spring Steel, Zinc Plated ( Passivated) Confor Ming To Is:3063. Note: Material To Be Procured From Clw Approved Vendors Only. [ Warranty Period: 30 Months After The Date Of Delivery ] [Quantity Tolerance (+/-): 5 %Age , Item Category : Normal , Total Po Value Variation Permitt Ed: Max 8 Lacs ] ]