USS Flat Washers are used in a wide variety of Industrial, Construction and Automotive Applications. Washers are intended to be mounted around a bolt or screw, between the fastener's bearing surface & the portion it is connected to. Flat washers are used to enhance the distribution of stress and to span big clearance holes. USS washers, compared with SAE Washers, have a large outer diameter, and are intended to meet the needs of majority of Industrial applications, such as production, servicing and repair.