A Lead Washer is a thin plate (typically disk-shaped, but sometimes square) with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener, such as a bolt or nut. It must be used to attach regulators to fluorine cylinders. The researchers forgot to use this special washer the first time they attached the regulator. Washers often have an outer diameter about twice their inner diameter, but this can vary quite widely. The offered Lead Washer is made available in various sizes and types as per the need. The washers are an important part of industries.