Single Coil Spring Washer Conforming To Rdso Drawing. No. T-10773 With Latest Alterati Ons If Any As On Date Of Closing Of This E-Tender. This Is A Safety Item. Specification: Single Coil Spring Washers Shall Conform To Irs Specification Irs T-42-2020 (Revision-01) With Latest Corrigendum If Any As On Closing Of This E-Tender. [ Warranty Period: 30 Months After The Date Of Delivery ] ]