M8 / 8mm METRIC WASHERS STANDARD FORM A THICK BRIGHT ZINC PLATED BZP DIN 125A
M8 - 8.4 x 17.0 x 1.6mm. Washers are Form A type (standard, thick, most common). These are the standard, most commonly used washers. Bright zinc plated. Zinc platted Form A Washer. M1.6 - 1.7 x 4.0 x 0.3mm.