Is the 90Â° fitting for metric tubing, brass, M765L compatible with stainless steel and copper tubing having the specified OD and wall thickness?

Yes . the 90Â° fitting for metric tubing, brass, M765L can be compatible with stainless steel and copper tubing, provided the stainless or copper tubing matches the specified outer diameter (OD) and wall thickness that determine the allowable working pressure. Compatibility depends on: - Exact OD and wall thickness matching the values listed for the metric tubing size in the attachment (the fittingâs allowable working pressure and sealing performance are based on those dimensions). - Tubing material strength and deformability: brass fittings of the LET-LOKÂ® type rely on proper bite/seal into the tube wall; stainless steel (harder) may require correct wall thickness and possibly a firmer assembly torque, while softer copper must not be excessively thin. - Corrosion and media compatibility: brass can contact stainless steel and copper, but consider galvanic corrosion in specific environments and the process media used. - Assembly and pressure rating: ensure the installed combination meets the allowable working pressure for the specified OD/wall thickness from the manufacturerâs table. Conclusion: If the stainless steel or copper tube exactly matches the specified OD and wall thickness in the attachment and installation follows manufacturerâs instructions (including torque and pressure limits), the 90Â° fitting for metric tubing, brass, M765L is compatible.

Can the 90Â° fitting for metric tubing, brass, M765L be used with tubing under different pressure ratings than those listed for the specified OD and wall thickness?

No. The 90Â° fitting for metric tubing, brass, M765L must be used only with tubing whose allowable working pressure matches the values specified for the given outer diameter and wall thickness. The allowable working pressure for this LET-LOKÂ® type is determined from the tubing OD and wall thickness (see attachment); using tubing with a different pressure rating can exceed the fittingâs rated capacity, risking leaks or failure. Always verify tubing dimensions and pressure ratings against the published values before installation.

Does the 90Â° fitting for metric tubing, brass, M765L require specific assembly torque or tools for leak-free connections?

Does the 90Â° fitting for metric tubing, brass, M765L require specific assembly torque or tools for leak-free connections? The 90Â° fitting for metric tubing, brass, M765L (LET-LOKÂ®) is a mechanical compression-style fitting designed for reliable, leak-free joints when assembled correctly. For leak-free connections it does not rely on a single numerical torque value applicable to all installations; instead, correct assembly depends on proper tube preparation, correct insertion depth, and controlled tightening to ensure the nut compresses the ferrule(s) onto the tube without distortion. Key practical points: - Tools: Use appropriate hand toolsâadjustable or open-end wrenches sized to the fitting flats. For consistency in repeated assemblies, a torque wrench set to the manufacturerâs recommended range (if provided) is advisable. - Tube preparation: Cut tubing squarely, deburr, and clean to ensure full ferrule engagement and metal-to-metal contact. - Tightening procedure: Finger-tighten the nut, then tighten further per the manufacturerâs specified number of turns past finger-tight (commonly 1â1Â¼ turns for many compression fittings) or to the specified torque if the manufacturer supplies a torque chart tied to tubing OD and wall thickness. Avoid over-tightening, which can damage ferrules or tubing and cause leaks. - Pressure and material factors: Because allowable working pressure depends on tubing OD and wall thickness, ensure the chosen tube meets pressure requirements. Thicker-walled or larger-diameter tubing may require different assembly care. - Reuse and maintenance: Follow manufacturer guidance on reusing ferrules or nuts; many systems recommend replacing ferrules for guaranteed integrity after disassembly. - Industry practice: In critical applications (chemical, pharmaceutical, energy, nuclear), follow the supplierâs exact assembly instructions, any specified torque values, and perform leak testing after assembly. If you need precise torque values or turn-counts for an exact tubing OD and wall thickness combination, consult the M765L (LET-LOKÂ®) manufacturerâs assembly chart or technical datasheet for that tubing size.

Coupling 90° for a metric tube, brass, M765L

All products, LET-LOK precision connectors/

Additional information

Material	B – brass (bronze)

A LET-LOK® 90° fitting for a metric tube intended mainly for the chemical, petrochemical and pharmaceutical industry, power generation, nuclear power plants and process engineering. The permissible working pressure is determined on the basis of the outer diameter and the wall thickness of the tube (details in the attachment). Material: brass.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Price	Quantity	Actions	Catalogue
HM-LM765L-06-B	Fitting 90° for a tube 6 mm, brass	-	-	In stock	0 zł		Enquiry

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A LET-LOK® 90° fitting for a metric tube intended mainly for the chemical, petrochemical and pharmaceutical industry, power generation, nuclear power plants and process engineering. The permissible working pressure is determined on the basis of the outer diameter and the wall thickness of the tube (details in the attachment). Material: brass.