SSP makes EMI connector gaskets for electrical and electronic connectors used in harsh environments and demanding applications.
We make standard and custom products from the EMI silicones we manufacture in Ballston Spa, New York (USA). Many of our materials are MIL-DTL-83528 QPL certified.
SSP makes connector gaskets in M83528/004 slash sizes. We also offer EMI gaskets for other types of connectors used in defense, aerospace, medical devices, robotics, and unmanned systems.
Specialty Silicone Products (SSP) manufactures high-performance EMI connector gaskets engineered to deliver environmental sealing and reliable shielding against electromagnetic interference (EMI) and radio frequency interference (RFI).
Unlike standard commercial rubber gaskets, SSP’s EMI connector gaskets prevent electromagnetic leakage across flange interfaces, connector housings, and enclosure cutouts while sealing against moisture, dust, jet fuels, and environmental contaminants.
Manufactured at our ISO 9001:2015 and AS9100D certified facility in Ballston Spa, New York, our EMI connector gaskets are die-cut or precision molded from elastomeric conductive silicones and fluorosilicones. We offer lower minimum order quantities (MOQs) and industry-leading turnaround times.
SSP produces precision EMI connector gaskets tailored to match commercial flange patterns and MIL-spec connector shell standards:
MIL-DTL-38999 Connectors (Jam-Nut & Flange Mount): Miniature, rugged circular connector gaskets engineered for aerospace, satellite, and naval defense electronics.
MIL-DTL-83528 Flange Seals: Molded and die-cut connector gaskets meeting official MIL-DTL-83528 slash sheet specs (such as M83528/004 flange gaskets).
D-Subminiature Connectors & Micro-D Connectors: Precision-cut gaskets designed for 9, 15, 25, 37, and 50-pin D-sub connectors and high-density Nano-D housings.
ARINC 600 Avionics Connectors: Rack-and-panel connector gaskets built to withstand severe vibration, altitude changes, and exposure to jet fuel or hydraulic fluids.
BNC Connectors & Coaxial RF Connectors: Circular twist-lock connector seals providing low contact resistance in RF transmission and test equipment.
Space-Grade Low-Outgassing Connectors: Specialty silicone gaskets passing NASA SP-R-0022A outgassing requirements for satellites and spacecraft.
Selecting the right conductive fill matrix ensures optimal shielding effectiveness (up to $110\text{ dB}$) and galvanic compatibility with your connector shell metal:
| Elastomer Grade | Base Polymer | Conductive Filler | Typical Application / Specification |
| SSP2569-65 | Silicone | Silver-Plated Copper | MIL-DTL-83528 Type A ($>110\text{ dB}$) |
| SSP2529 | Silicone | Silver-Plated Aluminum | MIL-DTL-83528 Type B ($>100\text{ dB}$) |
| SSP2573-75 | Fluorosilicone | Silver-Plated Copper | MIL-DTL-83528 Type C (Fuel & Solvent Resistant) |
| SSP2486-70 | Fluorosilicone | Silver-Plated Aluminum | MIL-DTL-83528 Type D (Aerospace & Jet Fuel) |
| SSP502 Series | Silicone | Nickel-Graphite | High-Attenuation Commercial & Galvanic Corrosion Resistance |
Faraday Cage Continuity: When compressed between the connector shell and the enclosure wall, the embedded metallic particles form a low-resistance path, creating an electrically continuous joint that blocks incoming or outgoing RF noise.
Environmental Sealing: The silicone or fluorosilicone elastomer matrix conforms to micro-imperfections in the flange surface, establishing an IP65, IP66, or IP67 environmental seal against fluid and dust ingress.
Controlled Compression: Proper gasket thickness and durometer selection ensure uniform electrical contact without over-compressing or distorting thin connector mounting flanges.
When mating an EMI connector gasket to an aluminum, stainless steel, or cadmium-plated connector shell, selecting the proper conductive filler is critical to prevent galvanic corrosion:
Aluminum Shells: Pair with Silver-Aluminum (Ag/Al) or Nickel-Graphite (Ni/C) fillers to match electrochemical potentials and avoid pitting corrosion.
Severe Environment / Fuel Exposure: Utilize Fluorosilicone (FVMQ) base materials to prevent fluid absorption and gasket swelling.
While standard EMI gaskets are produced as sheets, rolls, or long strip extrusions for general enclosure doors, an EMI connector gasket is specifically die-cut or molded to conform to standardized connector bolt patterns, shell flanges (such as MIL-DTL-38999 or D-sub), and tight connector mounting cutouts.
Yes. SSP die-cuts and waterjet-cuts custom EMI connector gaskets directly from customer CAD drawings or DXF files, accommodating custom mounting holes, unique flange shapes, and non-standard shell geometries.
Yes. SSP manufactures several conductive elastomer grades that are QPL-certified by the Defense Logistics Agency (DLA) under MIL-DTL-83528 (Types A, B, C, D, and K).