(1) Washer Ms Black Plain Machined Bore For Bolt 28 X M27, Bis Specn. No.Is:2016-1967, Table-I Reaffirmed 2001. (2) Washer M.S. Black Plain Machined Bore For Bolt 19X M18 Mat. Spec.:-Steel, I.S: 2016/1967 [Reaffirmed -2001] Or Latest (3) Washer Ms Black Plain Machined Bore 40 Mm For Bolt M-39. Specn: Bis Specification No: Is:2016-1967[ Reaffirmed-2001] Or Latest.