Is the Straight bulkhead fitting with GZ NPT for metric pipe, stainless steel, M774LM compatible with AISI 316 tubing of various wall thicknesses and OD ranges?

Yes. Straight bulkhead fitting with GZ NPT for metric pipe, stainless steel, M774LM is compatible with AISI 316 tubing across various outer diameters and wall thicknesses, provided the tubing dimensions fall within the allowable OD and wall-thickness ranges specified for the fitting. The fitting is specifically designed for metric tubing and is manufactured from AISI 316 stainless steel, matching the tube material. Allowable working pressure and suitability depend on the tubeâs outer diameter and wall thickness (see the detailed pressure ratings in the attachment). To ensure full compatibility, confirm that the specific AISI 316 tube OD and wall thickness you intend to use are listed in the attachmentâs table; if they are, the M774LM fitting is suitable.

Can Straight bulkhead fitting with GZ NPT for metric pipe, stainless steel, M774LM be used at specified working pressures for different tubing OD and wall thicknesses?

Yes. Straight bulkhead fitting with GZ NPT for metric pipe, stainless steel, M774LM can be used at the specified allowable working pressures provided the tubing outer diameter (OD) and wall thickness meet the limits given in the attachment. The LET-LOKÂ® straight bulkhead with external NPT for metric tubing is designed for chemical, petrochemical, pharmaceutical, energy, nuclear and process industries; allowable pressure is specified per OD and wall thickness and must be verified against those tables. Use AISI 316 tubing and ensure installation follows manufacturer torque and sealing instructions. If your tubing dimensions match the listed combinations, the fitting is suitable for the corresponding working pressure; if not, select a different fitting or tubing thickness.

Does the Straight bulkhead fitting with GZ NPT for metric pipe, stainless steel, M774LM require special installation tools for AISI 316 tubing?

Straight bulkhead fitting with GZ NPT for metric pipe, stainless steel, M774LM does not explicitly require special installation tools beyond standard fittings practice for AISI 316 tubing. The LET-LOKÂ® style bulkhead fitting is designed for use with metric tubing and AISI 316 material; proper installation normally involves cutting and deburring the tube, ensuring correct wall thickness and outer diameter per the allowable working pressure chart, inserting the tube into the fitting, and tightening the nut to the specified torque to compress the ferrule(s). For AISI 316 stainless steel you should: - Use clean, sharp tubing cutters or a precision saw to avoid work hardening or distortion. - Deburr and chamfer the tube end to the recommended dimensions. - Use spanners/wrenches sized to the fitting hex dimensions to achieve the proper assembly torque (follow manufacturer torque recommendations if provided). - If required by system specifications, use a torque wrench for repeatable, controlled tightening. No proprietary or specialized tools (like hydraulic presses or special fixtures) are indicated as mandatory for M774LM; standard hand tools and proper technique suffice. If the tubing is very thin-walled, you may need supports or backup tools to prevent deformation during tightening. Always follow the manufacturerâs assembly instructions and observe the allowable working pressure limits based on tube OD and wall thickness.

Straight bulkhead fitting with GZ NPT for metric pipe, stainless steel, M774LM

All products, LET-LOK precision connectors/

Additional information

Material	SS – stainless steel

Straight bulkhead fitting type LET-LOK® with external NPT thread for metric tubing, primarily intended for the chemical, petrochemical, pharmaceutical, energy, nuclear power, and process engineering industries. The allowable working pressure is determined based on the outer diameter and wall thickness of the tubing (details in the attachment). Material: AISI 316 steel.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HM-LM774LM-06-02-SS	Bulkhead fitting for 6 mm tube, GZ 1/8" NPT, SS	-	-	In stock	Enquiry
HM-LM774LM-06-04-SS	Bulkhead fitting for 6 mm tube, GZ 1/4" NPT, SS	-	-	In stock	Enquiry
HM-LM774LM-08-04-SS	Bulkhead fitting for 8 mm tube, GZ 1/4" NPT, SS	-	-	In stock	Enquiry
HM-LM774LM-10-04-SS	Bulkhead fitting for 10 mm tube, GZ 1/4" NPT, SS	-	-	In stock	Enquiry
HM-LM774LM-12-04-SS	Bulkhead fitting for 12 mm tube, GZ 1/4" NPT, SS	-	-	In stock	Enquiry
HM-LM774LM-12-06-SS	Bulkhead fitting for 12 mm tube, GZ 3/8" NPT, SS	-	-	In stock	Enquiry
HM-LM774LM-12-08-SS	Bulkhead fitting for 12 mm tube, GZ 1/2" NPT, SS	-	-	In stock	Enquiry

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Straight bulkhead fitting type LET-LOK® with external NPT thread for metric tubing, primarily intended for the chemical, petrochemical, pharmaceutical, energy, nuclear power, and process engineering industries. The allowable working pressure is determined based on the outer diameter and wall thickness of the tubing (details in the attachment). Material: AISI 316 steel.