Westfield Fasteners Product Specification:
Metric Red Fibre Flat Washer
This product guide contains the specification for metric red fibre flat washers, a series of standard parts available from Westfield Fasteners.
Red fibre washers are designed for sealing and spacing. When wet the fibre washer will swell a little, helping to form the seal, which makes them suitable for a variety of plumbing and automotive applications.
Fibre washers will compress slightly more than rubber or nylon washers. This means that they are less likely to be damaged by over tightening and abrasion, and therefore tend to have a longer lifespan.
Red fibre washer are resistant to sea water, oil, solvents and petroleum derivatives. Table 1 below lists the available sizes and their dimensions.

Figure 1: Metric Red Fibre Flat Washer