Is the Straight Connector with NPT Male Thread for Metric Tube, Stainless Steel, M768L compatible with tubing of different wall thicknesses and OD ranges?

Yes. The Straight Connector with NPT Male Thread for Metric Tube, Stainless Steel, M768L is designed to accommodate a range of tubing outer diameters and wall thicknesses. Its maximum allowable working pressure is specified according to the tube OD and wall thickness, which means the coupling can be used with different metric tube sizes and thicknesses provided the selected tube falls within the connector’s rated OD and wall-thickness limits. Manufactured from AISI 316 stainless steel and engineered for precision leak-tight joints, the M768L offers flexibility for various applications; however, you must verify the specific OD/wall-thickness compatibility and corresponding pressure rating for your tube size against the product’s technical data or manufacturer specifications before installation.

Can the Straight Connector with NPT Male Thread for Metric Tube, Stainless Steel, M768L be used in high-temperature or cryogenic applications?

Yes — the Straight Connector with NPT Male Thread for Metric Tube, Stainless Steel, M768L can be used in both high-temperature and cryogenic applications, with some qualifications. Why it’s suitable: - Material: Manufactured from AISI 316 stainless steel, which offers excellent corrosion resistance and retains mechanical properties across a wide temperature range, making it appropriate for many elevated-temperature and low-temperature (cryogenic) environments. - Design and sealing: The precision-engineered LET-LOK® design provides leak-tight connections crucial for extreme-temperature service, enhancing system safety and efficiency. Considerations and limitations: - Temperature limits: The exact allowable temperature range depends on the entire system (tubing material, seals, and any mating components). AISI 316 stainless steel typically performs well up to several hundred °C and down to cryogenic temperatures, but you must verify specific temperature ratings for the tubing and any soft seals (if used). - Pressure ratings: Maximum allowable working pressure varies with tubing outer diameter and wall thickness and may change with temperature. Check the pressure–temperature derating charts for both the connector and the tubing. - Application-specific verification: For critical chemical, petrochemical, nuclear, or high-risk process environments, validate compatibility with media, thermal cycling, and any applicable industry standards or codes before use. Recommendation: Confirm the full assembly’s temperature and pressure ratings (connector + tubing + seals) against your operating conditions; consult manufacturer datasheets or technical support for specific temperature limits and derating guidance.

Fitting straight with a male NPT thread for a metric tube, steel stainless, M768L

All products, LET-LOK precision connectors/

Additional information

Material	SS – stainless steel

A LET-LOK® straight fitting with thread external NPT for a metric tube 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-LM768L-02-02-SS	Fitting for a tube 2 mm - 1/8" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-03-02-SS	Fitting for a tube 3 mm - 1/8" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-03-04-SS	Fitting for a tube 3 mm - 1/4" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-04-02-SS	Fitting for a tube 4 mm - 1/8" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-04-04-SS	Fitting for a tube 4 mm - 1/4" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-06-02-SS	Fitting for a tube 6 mm - 1/8" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-06-04-SS	Fitting for a tube 6 mm - 1/4" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-06-06-SS	Fitting for a tube 6 mm - 3/8" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-06-08-SS	Fitting for a tube 6 mm - 1/2" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-08-02-SS	Fitting for a tube 8 mm - 1/8" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-08-04-SS	Fitting for a tube 8 mm - 1/4" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-08-06-SS	Fitting for a tube 8 mm - 3/8" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-08-08-SS	Fitting for a tube 8 mm - 1/2" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-10-02-SS	Fitting for a tube 10 mm - 1/8" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-10-04-SS	Fitting for a tube 10 mm - 1/4" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-10-06-SS	Fitting for a tube 10 mm - 3/8" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-10-08-SS	Fitting for a tube 10 mm - 1/2" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-10-12-SS	Fitting for a tube 10 mm - 3/4" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-12-02-SS	Fitting for a tube 12 mm - 1/8" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-12-04-SS	Fitting for a tube 12 mm - 1/4" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-12-06-SS	Fitting for a tube 12 mm - 3/8" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-12-08-SS	Fitting for a tube 12 mm - 1/2" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-12-12-SS	Fitting for a tube 12 mm - 3/4" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-14-04-SS	Fitting for a tube 14 mm - 1/4" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-14-06-SS	Fitting for a tube 14 mm - 3/8" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-14-08-SS	Fitting for a tube 14 mm - 1/2" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-15-08-SS	Fitting for a tube 15 mm - 1/2" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-16-06-SS	Fitting for a tube 16 mm - 3/8" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-16-08-SS	Fitting for a tube 16 mm - 1/2" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-16-12-SS	Fitting for a tube 16 mm - 3/4" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-18-06-SS	Fitting for a tube 18 mm - 3/8" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-18-08-SS	Fitting for a tube 18 mm - 1/2" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-18-12-SS	Fitting for a tube 18 mm - 3/4" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-20-08-SS	Fitting for a tube 20 mm - 1/2" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-20-12-SS	Fitting for a tube 20 mm - 3/4" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-22-12-SS	Fitting for a tube 22 mm - 3/4" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-22-16-SS	Fitting for a tube 22 mm - 1" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-25-08-SS	Fitting for a tube 25 mm - 1/2" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-25-12-SS	Fitting for a tube 25 mm - 3/4" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-25-16-SS	Fitting for a tube 25 mm - 1" NPT male, SS	-	-	In stock	Enquiry
HM-LM768L-38-24-SS	Fitting for a tube 38 mm - 1.1/2" NPT male, SS	-	-	In stock	Enquiry

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A LET-LOK® straight fitting with thread external NPT for a metric tube 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.