Description
Washers can be specified in ANSI nominal sizes or ANSI metric sizes. Important size dimensions to consider when specifying washers include Inside Diameter, Outside Diameter, Thickness or working Height, and rated
or working load. Materials of construction include Aflas, FKM or VITON, SILICON, EPDM, NBR, NEOPRENE, PTFE, PU, SBR & NATURAL. The hardness rating on a Shore A scale for Washers can be 30 ~ 95 Durometer. Exact specifications should be clarified by our engineers, as the chemical and physical properties of Washers can differ based on manufacturing technique.
Material?Selection?Guide
| MATERIAL | NR | SBR | NBR | CR | EPDM | HNBR | ACM | CSM | SILICONE | FKM (VITON) |
| HARDNESS RANGE ( SHORE A) | 40-90 | 35-90 | 40-90 | 40-80 | 40-90 | 40-90 | 40-80 | 40-80 | 30-80 | 50-90 |
| HIGH TEMP?C | 100 | 120 | 130 | 130 | 150 | 150 | 180 | 150 | 230 | 225 |
| LOW TEMP?C | -50 | -55 | -45 | -40 | -50 | -45 | -25 | -40 | -60 | -15 |
| STEAM | F | F | F | P | G | G | P | E | E | E |
E= EXCELLENT; G= GOOD; F= Fair; P= Poor; A=Available, NA= Not Available
This guide is intended for general reference Only. The materials listed are the most commonly used. There are numerous compound variations designed for specific applications for which please forward details to our engineers for recommendation.
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