Plugs are made in 1" - 3" NPT sizes and metric thread is available. NEMA 1,4,7 &12 Terminal housings for General Purpose - Class 1, Div II ratings are optional. Chromalox
Screw Plug heaters are UL, CSA and CE certified.
Screw plug immersion
heaters consist of tubular elements in a threaded hex
plug. Some models are provided with a thermowell for the temperature control sensor and a variety of electrical enclosures for electrical connections. They
screw directly through threaded openings...
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