M12 x 30mm Penny Washers - A4 Stainless Steel Penny Washers, also known as Repair Washers, offer a large outside diameter which helps protect the fastened surface from damage by distributing the tightened force over a larger surface area. They can also be used as spacers due to them being flat on both sides. These Flat Washers are made from A4 Marine Grade Stainless Steel which provides corrosion and oxidation resistance as well as increased resistance in harsh chemical and outdoor environments. For larger quantities or items not listed, please email and one of our team will provide you with a quotation. M12 x 30mm Penny Washers - A4 Stainless Steel