1-385HL-U21/2-316SS
Thermowell, 1" NPT, 316 Stainless Steel, 2.5", 385HL Series
- Manufacturer: OMEGA
- Product type:
- SVHC: Lead (04-Feb-2026)
| Delivery and price | |
|---|---|
| Units per pack | 1 |
| Price | 153.6 € |
| Current stock | 10+ |
| Lead time | 30 days |
## **Series 385HL Heavy-Duty Well for[3] ⁄8" Diameter Elements** **Application:** Standard length,[3] ⁄8" stem, bimetal thermometers. #14-gage thermocouple elements. Armored liquid-in-glass test thermometers. Other temperaturesensing elements having 0.377" maximum diameter. ## **Connection Size:** 1 NPT is standard. Other thread sizes are available upon request. ## **Materials:** Brass (ASTM B-16), Carbon Steel (C-1018), Stainless Steel A.I.S.I. 304 & A.I.S.I. 316, Monel[®] . Wells are also available in special materials; prices on request. ## **Cap and Chain Options:** For Brass cap, add suffix “ **-CC-Brass** ” to the end of the model number for an additional cost. For 304SS cap, add suffix “ **-CC** ” to the end of the model number for an additional cost. ## **Series 385HL—Lagging Extension Type External Thread “P”– 1 NPT** **==> picture [430 x 239] intentionally omitted <==** **----- Start of picture text -----**<br> 3 [/] 4 T 1 U INSERTION LENGTH<br>| ALLOWANCEWRENCHALLOWANCEWRENCH EXTENSIONLAGGING T ALLOWANCETHREAD Q DIA.<br>) | i<br>| LLie) 49/64<br>DIA.<br>† NPSM internal<br>| e 1/2 NPSM [†] P NPT e 0.385 BORE± 0.002 pipe thread will accept both NPT and<br>A STEM LENGTH [/1] 4 NPS male threads.<br>Dimensions: inches<br>To Order Visit omega.com/series_385hl for Pricing and Details<br>External Lagging Stem Insert Shank<br>Thread Extension Length Length Diameter<br>P Model Number T A U Q<br>1 NPT 1-385HL-U21/2-(*) 2 6 2 [1] ⁄2 1 [1] ⁄16<br>1-385HL-U41/2-(*) 3 9 4 [1] ⁄2 1 [1] ⁄16<br>1-385HL-U71/2-(*) 3 12 7 [1] ⁄2 1 [1] ⁄16<br>1-385HL-U101/2-(*) 3 15 10 [1] ⁄2 1 [1] ⁄16<br>1-385HL-U131/2-(*) 3 18 13 [1] ⁄2 1 [1] ⁄16<br>1-385HL-U191/2-(*) 3 24 19 [1] ⁄2 1 [1] ⁄16<br>Metric Models<br>Available!<br>See Pages<br>omega.com<br>**----- End of picture text -----**<br> _*****[Specify material type “]_ _**[304SS]**[” for 304 stainless steel, ]_ _**[“316SS” ]**[for 316 stainless steel, ]_ _**[“CS” ]**[for carbon ] steel or_ _**“BRASS”** for brass. PFA coating available, see omega.com._ _**Ordering Example: 1-385HL-U71/2-304SS,** 304 stainless steel thermowell with 1 NPT external thread, 0.385" internal diameter, 3" Lagging Extension, 7[1] ⁄2" insertion length, and a 12" stem length._ **For Assistance in Choosing Head and Well Assemblies, See omega.com. These wells are compatible with OMEGA[®] NB1, NB2; PR-12, PR-14, and NPT-style probes, as well as DialTemp™ Thermometers.** |**Well Type**|**Material**<br>|**Insertion Length—“U”**|**Insertion Length—“U”**|**Insertion Length—“U”**|**Insertion Length—“U”**|**Insertion Length—“U”**|**Insertion Length—“U”**|**Insertion Length—“U”**|**Insertion Length—“U”**| |---|---|---|---|---|---|---|---|---|---| |||**21⁄2**|**41⁄2**|**71⁄2 **|**101⁄2 **|**131⁄2 **|**161⁄2 **|**191⁄2 **|**221⁄2**| |1"- 385H<br>and<br> 1"- 385HL A.I.S.I. 304 & 316|Brass|321(150)<br>129|129(83.5)46.8 23.6 14.5 9.6|46.8 23.6 14.5 9.6|46.8 23.6 14.5 9.6|46.8 23.6 14.5 9.6|46.8 23.6 14.5 9.6|6.9|5.1| ||Carbon Steel|410(270)|249(150)90.3 45.6 27.8 18.5 13.2|90.3 45.6 27.8 18.5 13.2|90.3 45.6 27.8 18.5 13.2|90.3 45.6 27.8 18.5 13.2|90.3 45.6 27.8 18.5 13.2|90.3 45.6 27.8 18.5 13.2|9.8| ||- 385HL A.I.S.I. 304 & 316|483(350)|272(208)97.3 49.7 30.4 20.3 14.5 10.7|97.3 49.7 30.4 20.3 14.5 10.7|97.3 49.7 30.4 20.3 14.5 10.7|97.3 49.7 30.4 20.3 14.5 10.7|97.3 49.7 30.4 20.3 14.5 10.7|97.3 49.7 30.4 20.3 14.5 10.7|97.3 49.7 30.4 20.3 14.5 10.7| ||Monel|396 (300)|214 (167) 77.5 39.2 23.8 16.0 10.3|214 (167) 77.5 39.2 23.8 16.0 10.3|214 (167) 77.5 39.2 23.8 16.0 10.3|214 (167) 77.5 39.2 23.8 16.0 10.3|214 (167) 77.5 39.2 23.8 16.0 10.3|214 (167) 77.5 39.2 23.8 16.0 10.3|7.7| **Shown smaller than actual size.** _Where single values appear in the velocity tables, these may be considered safe for water, steam, air or gas. In the shorter insertion lengths, consideration is given to the velocity pressure effect of water flowing at higher velocities. The values in parentheses, therefore, represent safe values for water flow, while the unbracketed values may be used for steam, air, gas and similar density fluids._ **See omega.com for Pressure-Temperature Ratings.** **B-25**
Updated at June 9, 2026
Omega is a globally recognized leader in the design and manufacture of state-of-the-art products for process measurement and control. Renowned for its engineering expertise, the company provides highly reliable solutions for monitoring critical parameters such as temperature, humidity, pressure, strain, and flow across diverse industrial applications. Our extensive selection of Omega products is focused on the brand's core strengths in sensing and automation technologies. The range features a vast array of high-precision temperature sensors, including industry-standard thermocouples and RTDs, supported by a comprehensive selection of essential sensor accessories. To complement these measurement devices, we offer a substantial lineup of robust temperature controllers and advanced pressure transducers engineered to maintain precise conditions in demanding environments. Beyond primary sensing and control, the Omega portfolio encompasses sophisticated panel instrumentation for clear process visualization, alongside highly accurate force sensors and load cells. The offering is completed by reliable signal converters, data acquisition tools such as dataloggers, and fundamental connectivity components, providing professionals with the specialized equipment necessary to build complete, end-to-end industrial control systems.
About Novapart
Novapart is a B2B electronic component broker specialising in stock shortages and cost reduction. We source hard-to-find parts and identify compliant alternatives across a catalogue of 410,000+ components from 500+ manufacturers.
Learn more →Stock Shortage Specialist
When a component is unavailable, discontinued or has an unacceptable lead time, we tap into our network of vetted European and Asian distributors to source what you need — without compromising on quality or traceability.
Request a quote →Compliant Alternatives
We identify pin-to-pin, electrically equivalent substitutes that meet the same certifications (RoHS, AEC-Q100, REACH) as your original specification — validated against datasheets, not just part numbers. Often at a lower cost.
BOM Analysis service →