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High-Strength Aluminum Alloy Sealing Sleeves

Aluminium sealing sleeve: the bore is sealed against the medium, and the wall carries the bolt clamp load through the stack.

Key specifications

Material6061-T6 Aluminum Alloy
Installationbolt passes through the sleeve for spacing
StandardGB/T 3191 (aluminium bar), customer drawing
Typical substratebattery packs and lightweight structures
Key inspectionsbore, length, compressive load

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Product overviewOverview

In a bolted joint the sleeve carries the compressive load and fixes the distance between the clamped parts, while keeping the bolt away from the hole wall. Sealing and load carrying are separate duties here. The seal depends on groove depth and on the sleeve face staying flat, while the wall has to resist crushing under the bolt preload. Anodising grows the surface by a few micrometres, which is enough to change a groove fit if it is not allowed for.

Material: 6061-T6 Aluminum Alloy. The bolt passes through the sleeve to set the spacing.

Key featuresFeatures

Seal groove fit has to allow for anodic oxide growth.
6061-T6 bar or extrusion, dimensionally stable at about one third the density of steel.
Each sleeve is cut to the spacing the assembly needs, with bore and outside diameter matched to the bolt and the housing.
Anodising adds corrosion resistance and electrical insulation.

Typical applicationsApplications

Battery module spacing
Lightweight body structures
Motor and inverter mounting isolation

Selection notesSelection

Specify anodising before fixing groove dimensions, and check that the sleeve face is flat enough for the seal to seat; a face that is not square loads the seal on one side.

Frequently asked questionsFAQ

Does anodising affect the seal?

It can. The oxide layer grows into and out of the surface, changing groove dimensions by a few micrometres, so groove size has to be quoted for the finished condition rather than the machined one.

What matters during installation of the High-Strength Aluminum Alloy Sealing Sleeves?

Pass the bolt through the sleeve to set the spacing. Seal groove fit has to allow for anodic oxide growth.

Specifications

Material	6061-T6 Aluminum Alloy
Standard	GB/T 3191 (aluminium bar), customer drawing
Installation	bolt passes through the sleeve for spacing
Typical substrate	battery packs and lightweight structures
Key inspections	bore, length, compressive load

Manufacturing and inspection

Bore, outside diameter, length and wall thickness are sampled by calliper or optical gauge.We recommend a pilot assembly at the actual torque and mating part before locking the process parameters for volume.