M16 x 30mm OD DIN 125 Low Carbon Zinc Finish Steel Type A General Purpose Flat Washer / CROSS-SECTIONAL SHAPE STYLE: 1 RECTANGULAR HOLE DIAMETER: 17.0 MILLIMETERS NOMINAL PERIPHERAL SHAPE STYLE: 1 ROUND CENTER HOLE SHAPE STYLE: 1 ROUND THICKNESS: 3.0 MILLIMETERS NOMINAL OVERALL DIAMETER: 30.0 MILLIMETERS NOMINAL PART NAME ASSIGNED BY CONTROLLING AGENCY: FLAT WASHER SPECIAL FEATURES: ROHS COMPLIANT; MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ISO4042 INTERNATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL