| Explosionproof, dust-Ignitionproof |
| Accurately tapped, tapered threads for tight, rigid joints and ground continuity |
| NEMA 3R universal drain or breather for high performance water drainage or continuous ventilation |
| NEMA 4X drain for automatic water drainage |
| NEMA 3R group B universal drain or breather for automatic water drainage or continuous ventilation (raintight) |
| Groups C and D universal drain or breather for automatic water drainage or continuous ventilation |
| Non-hazardous location drain for automatic water drainage |
