Rubber Washers

Product Description

A rubber washer is defined as a thin disk made of rubber with a hole in the middle. The washer is normally used to support the weight of a threaded fastener. It is also used as a spacer, spring, wear pad, pre-load indicating device as well as locking device.Washers are made of various materials like metal, plastic, rubber. A common material is rubber. Rubber washers are used in taps or valves where they act as the seal that prevents or closes the flow of liquid or gas. All washers have an outer diameter (OD) about twice their inside diameter (ID). Rubber gaskets which are used in taps to stop the flow of water are also sometimes referred to as washers because they look similar. But, washers and gaskets are usually made differently and designed for different functions.

Types of rubber used in rubber washers

• Neoprene
• Styrene Butadiene Rubber (SBR)
• Ethylene Propylene Diene Monomer
  
• Silicone Rubber (SiR)
• Nitrile Rubber (NBR)
• Fluoroelastomers (FKM)/Viton

Features of rubber washers
Rubber materials are preferred for washers because of rubber's

• Innate flexibility
• Pliability
• Conformability
• Most rubber grades are as thin as 0.016" to 0.250" thickness.
• It is also measured in terms of hardness (durometer) as soft as 30 and as hard as 90 duro.
• Materials are also available as continuous rolls or cut-to-size.