Form C Heavy Washer M8 x 21mm OD

Form C washers, also known as type C washers, are standardized flat washers with a slightly larger outer diameter compared to regular flat washers. These Form C washers are commonly used in both metal and timber applications because their larger diameter aids in distributing the load evenly. Washers are typically employed alongside threaded fasteners, such as bolts and nuts, to prevent loosening and ensure that the load from the nut or bolt head is evenly distributed over a wider area.