M16 x 30mm OD DIN 125 A4 Stainless Steel Type A 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: GENERAL PURPOSE FLAT WASHER SPECIAL FEATURES: SPECIFICATION DIN 125 MATERIAL: STEEL CORROSION RESISTING OVERALL