ISO 7089 plain flat washer sized for an M18 bolt, with a 19 mm inner diameter, 34 mm outer diameter, and 3 mm thickness. The steel is hardness class HV200 with an electro-galvanised FZB finish for corrosion resistance in dry indoor service. It is intended to distribute clamp load beneath a nut or bolt head in a standard bolted joint. Supplied under manufacturer part number 7089182, EAN 5711160255234, HS code 7318.22, country of origin China.