Is the Stainless Steel Tube Connector with GW NPT, M739LF compatible with aggressive chemicals and high-temperature environments?

Yes. The Stainless Steel Tube Connector with GW NPT, M739LF is manufactured from AISI 316 stainless steel and engineered for high-performance use in harsh environments. Its material and robust construction provide excellent resistance to corrosion and aggressive media, making it suitable for many chemical processing, petrochemical, pharmaceutical, energy and nuclear applications. The fitting is designed to maintain secure, leak‑tight connections under extreme operating conditions, including elevated temperatures and pressure cycles. Actual compatibility with specific aggressive chemicals and maximum service temperatures depends on the exact chemical agents, concentrations, temperatures and the tube’s OD and wall thickness (which determine permissible working pressure). For critical or unusual media and temperature ranges, verify compatibility against AISI 316 chemical resistance data and consult the manufacturer’s pressure‑temperature ratings and application guidance.

Can the Stainless Steel Tube Connector with GW NPT, M739LF withstand cyclic pressure and temperature changes without compromising leak-tightness?

Yes. The Stainless Steel Tube Connector with GW NPT, M739LF is engineered to maintain leak-tightness under cyclic pressure and temperature changes. Manufactured from AISI 316 stainless steel and built with precise LET-LOK® metric fitting design and internal NPT thread, it provides robust mechanical integrity, excellent corrosion resistance, and stability against aggressive media and extreme conditions. Its secure construction and precision sealing maintain system integrity during thermal expansion/contraction and repeated pressure cycles. Permissible working pressure is determined by the tube’s outer diameter and wall thickness, so selecting appropriate tube dimensions for the expected pressure and temperature ranges is essential to ensure long-term performance. For critical or highly variable cycles, validate application-specific parameters (pressure amplitude, cycle frequency, temperature range, and media) against material and fitting specifications and consider testing or engineering review to guarantee lifetime leak-tightness.

Fitting tubular with a female NPT thread, steel stainless, M739LF

All products, LET-LOK precision connectors/

Additional information

Material	SS – stainless steel

Fitting tubular metric type LET-LOK® with thread internal NPT intended mainly for industry chemical, petrochemical, pharmaceutical, power generation, nuclear power plants and process engineering. The permissible pressure working specifies on the basis of diameter outer and wall thickness wall tubes (details in the attachment). Material: steel AISI 316.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HM-LM739LF-03-04-SS	Fitting tube 3 mm, 1/4" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-04-04-SS	Fitting tube 4 mm, 1/4" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-06-02-SS	Fitting tube 6 mm, 1/8" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-06-04-SS	Fitting tube 6 mm, 1/4" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-06-06-SS	Fitting tube 6 mm, 3/8" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-06-08-SS	Fitting tube 6 mm, 1/2" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-08-02-SS	Fitting tube 8 mm, 1/8" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-08-04-SS	Fitting tube 8 mm, 1/4" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-08-08-SS	Fitting tube 8 mm, 1/2" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-10-04-SS	Fitting tube 10 mm, 1/4" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-10-06-SS	Fitting tube 10 mm, 3/8" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-10-08-SS	Fitting tube 10 mm, 1/2" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-12-04-SS	Fitting tube 12 mm, 1/4" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-12-06-SS	Fitting tube 12 mm, 3/8" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-12-08-SS	Fitting tube 12 mm, 1/2" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-16-06-SS	Fitting tube 16 mm, 3/8" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-16-08-SS	Fitting tube 16 mm, 1/2" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-20-08-SS	Fitting tube 20 mm, 1/2" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-20-12-SS	Fitting tube 20 mm, 3/4" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-25-12-SS	Fitting tube 25 mm, 3/4" NPT female, SS	-	-	In stock	Enquiry
HM-LM739LF-25-16-SS	Fitting tube 25 mm, 1" NPT female, SS	-	-	In stock	Enquiry

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Fitting tubular metric type LET-LOK® with thread internal NPT intended mainly for industry chemical, petrochemical, pharmaceutical, power generation, nuclear power plants and process engineering. The permissible pressure working specifies on the basis of diameter outer and wall thickness wall tubes (details in the attachment). Material: steel AISI 316.