(138) O-rings, when installed in a groove design that allows 10%–20% compression and 80%–95% gland fill, will provide both an EMI and moisture seal. Custom tools can be fabricated for prototypes and production quantities when diameters are larger than 2.000 in. (50.8 mm). Round strips can also be vulcanized to create O-rings to include parts with diameters larger than 3.000 in. (76.2 mm). O-rings with a diameter less than 3" (76.2 mm) will be molded. O-rings with a diameter of 3" (76.2 mm) or more may be molded or spliced.
(36) Some of the standard sizes of washers that can be die-cut from sheet material are listed here. Besides the circular shape, intricate shapes can be designed and die-cut to meet custom requirements.
(19) Standard sizes of molded rings are shown here. These components, as in the O-rings above, can be supplied spliced and vulcanized to dimensions in excess of two inches I.D.
