Metric DIN 7349 thick flat washers for bolts with heavy type spring pins are circular flat washers with a central hole that are thicker and have a larger outer diameter (OD) than the most commonly used metric flat washer (DIN 125). Consequently, the DIN 7349 thick flat washers have a larger surface area and are used where larger bearing surfaces are required. BRK Industries offers over 500,000 unique fastener products from stock in inch and metric standard in a variety of materials and finishes. The following sizes of DIN 7349 thick flat washers are available for immediate shipping from stock: Diameters ranging from M3 to M30 in regular zinc plated steel and stainless steel A2 and stainless steel A4. View parts by clicking on the following link: Metric Thick Flat Washers DIN 7349.