The Enclosure Tube Coupling 115mm is designed to create a modular interface between compatible 115mm Blu-Sub enclosure tube sections. When used with the required Subsea Aluminum Flange, the coupling can join Subsea Enclosure Acrylic Tube sections, Subsea Enclosure Aluminum Tube sections, or mixed acrylic and aluminum enclosure tube assemblies.
In addition to joining tube sections, the coupling provides radial M10 access around the enclosure body. This is useful when cable penetrators, sealing plugs, connectors, or other compatible M10 components are better positioned along the side of the enclosure instead of through an axial end-cap. This can improve cable routing, reduce congestion at the end-cap, and allow cleaner access when removing or reinstalling the end-cap during service.
The coupling is especially useful for longer enclosure builds, modular electronics layouts, or systems where wiring needs to pass between connected tube sections. It can also help when a standard tube length is slightly too short and a small extension is required as part of a larger enclosure assembly.
When the coupling is used at the end of an enclosure assembly, it requires the matching Blank End-Cap for 115mm Coupling available on this page. Standard 115mm aluminum end-caps are designed for the normal flange interface and do not attach directly to the coupling. Custom port configurations, alternate hole sizes, and specialty end-caps may be available upon request, but custom configurations require additional lead time and may increase cost.
Metric Sealing Plug (Blank), cable penetrators, connectors, flanges, and other port hardware are sold separately. Any unused holes must be properly sealed before underwater use. The overall depth rating of a complete enclosure assembly is determined by the lowest-rated component in the system, and very long enclosure assemblies should be externally supported to reduce mechanical stress on the tube and coupling interfaces.
A ball-end hex socket screwdriver is required during installation, as the coupling mounting screws are fastened at an inclined angle. Always verify O-ring condition, sealing surfaces, fastener installation, and port sealing before deployment.
| Enclosure Tube Coupling 115mm – 16-Hole M10 | Blank End-Cap for 115mm Coupling | |
|---|---|---|
| Product Type | 115mm enclosure tube coupling with radial access holes | Blank end-cap for 115mm coupling |
| Material | 6061 Aluminum | 6061 Aluminum |
| Surface Finish | Black anodized / oxidized finish | Black anodized / oxidized finish |
| Compatible Enclosure Series | 115mm acrylic and aluminum enclosure systems | 115mm coupling assemblies |
| Required Mating Interface | 115mm aluminum flange | 115mm enclosure tube coupling |
| Port / Hole Configuration | 16 × Ø10.1 through holes arranged circumferentially | Blank, no port holes |
| Compatible Port Components | M10×1 components | Not applicable |
| Rated Depth | 1,000m / 3,281ft | 1,000m / 3,281ft |
| Weight | 252g | 221g |
| Included Mounting Hardware | 16 × mounting screws for connecting 115mm flange | 8 × mounting screws for connecting 115mm coupling |
| Included O-Ring | Not included | 1 × O-ring included |
| Installation Tool Note | Ball-end hex socket screwdriver required for inclined-angle screw installation | Ball-end hex socket screwdriver required when installing to coupling |
Measurements and dimensional references should be verified against the product drawing before machining or integration.
What is the Enclosure Tube Coupling 115mm used for?
The Enclosure Tube Coupling 115mm is used to join compatible 115mm Blu-Sub enclosure tube sections together while also providing radial M10 access points around the side of the enclosure body. This can help with modular enclosure builds, longer tube assemblies, and cleaner cable routing.
Can it join acrylic and aluminum enclosure tubes?
Yes. The coupling is compatible with the Subsea Enclosure Acrylic Tube and Subsea Enclosure Aluminum Tube 115mm enclosure systems when used with the required Subsea Aluminum Flange. Acrylic-to-acrylic, aluminum-to-aluminum, and mixed acrylic/aluminum assemblies are possible.
Does the coupling connect directly to the tube?
No. The coupling is designed to interface with the Subsea Aluminum Flange. The appropriate flange is required between the coupling and each enclosure tube section.
What size components fit the side holes?
The coupling has 16 radial Ø10.1 through holes intended for compatible M10×1 components, such as sealing plugs, cable penetrators, or other suitable M10 hardware.
Are sealing plugs or cable penetrators included?
No. Metric Sealing Plug (Blank), cable penetrators, connectors, flanges, and other port hardware are sold separately. Any unused holes must be properly sealed before underwater use.
Why use radial M10 holes instead of putting everything through the end-cap?
Radial access can improve cable routing and reduce congestion at the end-cap. It can also make servicing easier because the end-cap can be removed without pulling all cables and connections out with it.
Can the coupling be used at the end of an enclosure?
Yes. When the coupling is used at the end of an enclosure assembly, it requires the matching Blank End-Cap for 115mm Coupling available on this page. Standard 115mm aluminum end-caps are designed for the normal flange interface and do not attach directly to the coupling.
Can multiple couplings be used in one enclosure assembly?
Yes. Multiple tube sections may be chained together using additional couplings and Subsea Aluminum Flange components. For very long enclosure assemblies, external support should be used to reduce mechanical stress on the tube and coupling interfaces.
What is the depth rating?
The coupling and matching blank end-cap are rated to 1,000m / 3,281ft. The actual depth rating of a complete enclosure assembly is determined by the lowest-rated component in the system.
Is a special tool required for installation?
Yes. A ball-end hex socket screwdriver is required because the coupling screws are fastened at an inclined angle.
Can custom hole sizes or custom end-caps be supplied?
Custom hole sizes, port configurations, and specialty end-caps may be available upon request. Custom configurations require additional lead time and may increase cost.
Is this available for 85mm or 165mm enclosure tubes?
This standard coupling is for the 115mm enclosure series. Contact us for custom requirements related to 85mm or 165mm enclosure systems.