- TE Connectivity’s DEUTSCH industrial environmentally sealed electrical connectors are heavy-duty connectors designed to withstand dirt, moisture, salt spray, and rough terrain. DEUTSCH connectors are constructed of rugged thermoplastic or durable aluminum and feature silicone seals and grommets that help prevent contamination. The connectors are available in rectangular and cylindrical body shapes and accommodate wire gauges from 4 AWG to 22 AWG (25 mm