DIN 134 MS Plain washer M12, Inside Diameter: 13 mm, Outside Diameter: 32 mm, Thickness: 2.6~3 mm, Steel Grade: Mild Steel Finish: Yellow Passivated 30 pcs. DIN 6796 Conical Lock washer Inside Diameter: 13 mm, Outside Diameter: 29 mm, Thickness: 2.6~3 mm, Steel Grade: Mild Steel Finish: Yellow Passivated 30 pcs.