STEEL Sheath

Screw Plug 2″ NPT Immersion Heater
Steel Sheath w/ Steel Screw plug – Silver Brazed
FOR OIL – 22 watts per square inch with thermowell
3/8″ ID Stainless Steel Thermowell
Non-Regulated and Regulated (Single Pole Stat)
General Purpose and Moisture/Explosion Resistant Enclosures
Nema Type 1, 4, 4X, & 9
Reference Page 29 -30 – 31 – 32