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Suction Cup Bracket mounted on 4040 extrusion
This bracket lets you attach heavy‑duty suction cups to 4040 aluminum extrusion, creating a solid, repositionable mounting point on smooth, non‑porous surfaces.

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Features

  • Strong, temporary hold on smooth, non‑porous surfaces (glass, sealed metal, glazed tile)
  • Maintains extrusion‑mount stability when properly installed
  • Compatible with 4040 aluminum extrusion; validated with Type I profile
  • Installs in minutes using basic hand tools
For maximum stability on an extrusion‑based stand, use four suction cups distributed across your mount.

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Compatibility

  • Extrusion: 4040 aluminum extrusion (Type I profile recommended)
  • Suction cup: 1/4‑20 threaded stud or 1/4‑20 female insert
  • Hardware interface: 1/4‑20 fastener for the cup; M6 T‑nuts/bolts for typical 4040 extrusion slots
The bracket mounts to your existing extrusion hardware. If you need spares, keep two M6 T‑nuts and two M6×12 (or similar) bolts on hand for each bracket.

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Bill of materials

You need the following parts for each bracket:
PartQuantityNotes
Heavy‑duty suction cup with 1/4‑20 interface1Stud or female insert, rated for smooth, non‑porous surfaces
1/4‑20 × 5/8” screw1Button or hex head; use with threadlocker if desired
M6 T‑nut (for 4040 extrusion)2Optional if you don’t already have spares
M6×12 bolt2Optional; matches the T‑nuts above
Suction cups can release unexpectedly if the surface is dirty, textured, or if temperature/humidity changes occur. Do not use for overhead loads or in situations where unexpected release could cause injury or damage.

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Installation

1

Prepare the surface and parts

  • Clean the target surface with isopropyl alcohol and a lint‑free cloth; let it dry.
  • Inspect the suction cup for nicks or debris on the sealing lip.
  • Gather: bracket, suction cup, 1/4‑20 × 5/8” screw, two M6 T‑nuts, two M6×12 bolts, hex keys.
The surface should be smooth, dry, and free of dust or oils.
2

Attach the suction cup to the bracket

  • Insert the 1/4‑20 screw through the bracket and into the suction cup’s threaded interface.
  • Tighten until snug (finger‑tight plus a quarter‑turn). Avoid over‑tightening which can deform the cup mount.
3

Mount the bracket to the extrusion

  • Slide two M6 T‑nuts into the 4040 extrusion slot.
  • Align the bracket holes with the T‑nuts and install the M6×12 bolts.
  • Tighten evenly until the bracket is secure and cannot slide.
4

Set the suction cup and verify hold

  • Lightly moisten the cup’s rim (water only, no oils), press firmly against the surface, and engage the cup’s lever (if present).
  • Perform a firm pull test to confirm a solid seal.
After 5 minutes, re‑check for any movement or loss of vacuum. Re‑seat if needed.

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Best practices

  • Place cups on flat, non‑textured, non‑porous surfaces only
  • Distribute multiple cups to spread load and reduce peel forces
  • Re‑seat cups if they have been loaded continuously for a long period
  • Use medium‑strength threadlocker on the 1/4‑20 screw if you see loosening from vibration
  • Ensure the glass is tempered/thick enough for expected forces
  • Avoid mounting near edges where peel forces are highest

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Troubleshooting

  • Clean both the surface and cup rim thoroughly
  • Try a different surface; micro‑texture or matte coatings reduce adhesion
  • Lightly moisten the rim with water and re‑seat with firm pressure
  • Confirm you are using the correct T‑nuts for 4040
  • Tighten both bolts evenly; add a star washer if needed for extra bite
  • Apply medium threadlocker to the 1/4‑20 screw and M6 bolts
  • Re‑check tightness at the start of each session

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Printed parts and CAD files

PartFiles
Suction Cup Bracket (4040 Aluxprofile)STEP / STL
Suction Cup Bracket (3030, by @neos)STEP

OSSM Mounting

Overview of extrusion and basic mounts for OSSM.

OSSM Extrusion Mount

Bill of materials and hardware used across our extrusion‑based mounts.
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