DTI washers (Standard Type) ASTM F959, PLAIN CARBON STEEL, HDG Ø21 Dia 660 pcs Ø23 Dia 11500 pcs ASTM F959, PLAIN CARBON STEEL, Zinc Flake Coating Ø26 Dia 3700 pcs Ø39 Dia 5250 pcs Requires 3.1 Cert Raw material (steel) origin: Important Note: Russia / Belarus origin not acceptable