Parker Chomerics metal-based connector gaskets are die-cut from several sheet materials which suit various EMI shielding and pressure sealing requirements. They are available in sizes for all standard AN Series Connectors, as well as for RF types, JT, PT & PC, SO, SP and Bendix Connectors. Although these materials provide effective EMI shielding performance upon initial installation, they should be replaced if joints are opened and reclosed. EMI shielding is provided by oriented or expanded monel, or aluminum wire. Pressure sealing is provided by silicone or neoprene elastomer. POLASHEET gaskets are available with adhesive backing for quick mounting on one of the mating surfaces.

Materials and Construction
Gaskets are cut from the materials listed below, in sizes ranging from 0.688 in. (17.48 mm) to 3.25 in. (82.55 mm) square to fit connector shell sizes 6 to 48. Fastener holes are provided at each corner for mounting (slots in silicone- filled METALASTIC gaskets). The materials are described in detail on the previous pages.
POLASHEET Gaskets: Perpendicular monel wire in solid silicone, 0.062 in. (1.57 mm) thick. Compensates for 0.008 in. (0.20 mm) joint unevenness. Excellent EMI shielding and pressure sealing. Available with pressure- sensitive adhesive backing. METALASTIC Gaskets: Silicone or neoprene-filled aluminum mesh, 0.020 in. (0.51 mm) thick. Recommended where space is tight. Compensates for no more than 0.002 in. (0.05 mm) joint unevenness. Note: Use silicone for temperatures to 500°F (260°C). PORCUPINE METALASTIC Gaskets: Severely expanded monel, silicone-filled, 0.030 in. (0.76 mm) thick. Compensates for only 0.005 in. (0.127 mm) joint unevenness. Best for breaking through non- conductive surface films.