Spring Lock Washer B-20 , Phosphate Coated. Specification No:- To Is 3063 : 1994,Seco Nd Revision (Reaffirmed 2021,Incorporating 01 Amendments) [ Warranty Period: 30 Months After Th E Date Of Delivery ] [Quantity Tolerance (+/-): 5 %Age , Item Category : Normal , Total Po Value Variation Permitt Ed: Max 8 Lacs ] ]