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Brass industrial thermowell with 5/8-18 UNF thread and 1/2 NPT connection

Value Brand

Value Brand Industrial Thermowell Brass 5/8-18 UNF measurement tool

SKU CH-W4G9-SEF0M

Brass thermowell with 5/8-18 UNF internal thread and 1/2 in NPT process connection for temperature sensor protection

  • Product typeEnvironmental & Mechanical
  • Brass construction resists corrosion in harsh environments
  • 5/8-18 UNF internal thread fits standard sensors
  • 3 inch stem length suits common process depths
  • 1/2 inch NPT process connection matches piping standards
  • 31 inch wrench allowance enables secure installation

Industrial Thermowell Brass 5/8-18 UNF

This brass thermowell protects temperature sensors in industrial processes. It suits maintenance engineers and plant technicians who need reliable immersion fittings for 1/2 in NPT process connections. The 5/8-18 UNF internal thread accepts standard probes. Buyers needing different thread forms or longer insertion lengths should select another model.

Thermals Noise and Power Draw

As a passive brass component the thermowell generates no heat, consumes no power and produces no noise. Its material conducts process temperature to the sensor without thermal lag. There are no moving parts to wear or vibrate. The fitting simply threads into the process line and remains in service.

Bundled Accessories and Software

No accessories, software or documentation are supplied with this thermowell. The item ships as a single brass fitting ready for installation. Users must provide their own temperature probe, thread sealant and installation tools. The absence of bundled items keeps the product focused on its core pressure-boundary function.

How it compares

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

Price $7.99
Cheaper than about 93% 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 1/2 in NPT process connection without stripping the brass threads?

Apply PTFE tape to the 1/2 in NPT male threads, thread the thermowell into the female port by hand until snug, then tighten with a wrench on the 0.31 in wrench allowance flats only. Do not use the shank or sensor bore for leverage.

What maintenance does the brass thermowell need over time?

Inspect the 0.447 in bore for scale or corrosion during sensor changes. Clean threads with a brass brush if re-installing. Replace the unit if the 0.62 in shank shows pitting, erosion, or deformation from process flow.

At what point does the 2 13/100 in insertion length limit temperature response under sustained flow?

The fixed 2 13/100 in insertion depth determines thermal lag. In high-velocity streams, the sensor tip may not reach the pipe centreline, so the reading reflects wall-proximate temperature rather than bulk fluid temperature.

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