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Brass threaded thermowell with straight shank and male threads

Value Brand

Value Brand 24C455 Thermowell UNEF Brass Male

SKU CH-EN1K-SN71X

Threaded brass thermowell with 3/4 in MNPT shank for temperature sensor protection up to 350 degrees F at 250 psi

  • Product typeEnvironmental & Mechanical
  • Straight shank simplifies installation in threaded ports
  • Brass construction resists corrosion in harsh environments
  • Rated 150 °F at 300 psi for moderate pressure
  • Rated 350 °F at 250 psi for higher temperature
  • Prop 65 warning disclosed for California compliance

Thermowell for temperature sensing

This brass thermowell provides a protective housing for temperature probes in industrial process lines. The straight shank design fits directly into a 3/4 inch MNPT process connection for secure installation. It suits maintenance engineers and plant operators who need reliable sensor access without interrupting flow.

Thermal limits and pressure ratings

Maximum operating temperature reaches 150 degrees F at 300 psi and 350 degrees F at 250 psi for sustained service. The brass construction resists corrosion in water, oil and compatible chemical streams. No active cooling or power draw is involved because the component is a passive mechanical fitting.

Included compliance notice

The product carries a California Proposition 65 warning for substances linked to cancer and reproductive harm. No additional accessories, seals or mounting hardware are bundled with the thermowell. Buyers requiring certified material traceability or alternative alloy options must source those separately.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $12.99
Cheaper than about 87% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameZORO SELECT
Product typeEnvironmental & Mechanical

Questions about this item

How do I install the 3/4 in MNPT brass thermowell and what step is often missed?

Thread the male NPT end into the process fitting using PTFE tape or pipe sealant; the step often missed is tightening to the proper torque so the 3 1/2 in insertion length seats fully without cross-threading the brass shank.

What maintenance or replacement will the brass thermowell need over time?

Inspect the brass shank periodically for corrosion or erosion from the process fluid; replace the thermowell if the 3/4 in MNPT threads show wear or if the straight shank develops pitting that could affect the temperature sensor fit.

What is the first operating limit reached under sustained high-temperature use?

At 350 Degrees F the maximum allowable pressure drops to 250 psi, so sustained exposure near that temperature will hit the pressure derating before the 150 Degrees F at 300 psi rating becomes relevant.

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