DIN 436 square washer in S4B steel with hot-dip galvanised (FZB) finish. Square washers FZB (Fortification / Washers / Square washers). Principal data: bolt dimension 8 mm, inner diameter 9 mm, square side 25 mm, thickness 3 mm, indicative package size 100 pcs. Supplied under manufacturer part number 178869, EAN 7340080715351, HS code 7318.22, country of origin China.