Round Tube Plugs — Conical Head

Finish Your Tubing — Get a Flush Look and Protect Floors from Damage

Round Internal Tube Plugs — Conical Head are designed to solve a common problem with open round tubing: exposed ends that scratch floors, collect debris, and cause furniture or equipment to rattle during everyday use. Bare metal edges wear down surfaces quickly, while loose or low-quality caps crack, shift, or fall out long before they should.

Instead of sitting proud or leaving visible gaps, Round Internal Tube Plugs — Conical Head install cleanly inside the tube and finish flush at the opening. A ribbed compression-fit body grips securely inside 3–4 mm tube walls, while the conical head aligns smoothly with the tube edge — creating a professional, low-profile finish without glue, screws, or tools.

Cheap caps loosen. Improvised fixes fail. And once they do, the tubing is exposed again. Even light movement can bring scratching, vibration, and wear right back.

Round Internal Tube Plugs — Conical Head provide a dependable, long-term solution using durable polyethylene construction and a precision-fit design engineered to stay locked in place.

If your tube legs scratch the floor…

If frames vibrate or shift during use…

If you need a plug that installs flush and stays seated —

These conical head tube plugs are built to finish the job properly.

What These Tube Plugs Help You Avoid

• Rattling and vibration from loose or unsealed tube ends.
• Floor scratches and scuff marks caused by exposed metal tubing.
• Moisture, dirt, and debris entering open tube interiors.
• Caps that loosen or pop out under repeated movement.
• Unfinished edges that look unprofessional or reduce stability.

Your tubing looks finished. Your floors stay protected. And your furniture or equipment stays quieter and more secure.

Built for Furniture, Fixtures & Industrial Use

Durable Materials That Hold Up Over Time

Size & Fit Details

Size:
• Outer Diameter: Ø30 mm
• Fits Tube Wall Thickness: 3–4 mm

Color:
• Black — clean, professional, and suitable for visible or concealed installations

Fit Tip: Measure the inner diameter and wall thickness of your tubing to ensure a proper compression fit. No trimming or adjustment required.

Perfect For

✔ Chairs, stools, and metal furniture legs
✔ Tables, workstations, and equipment frames
✔ Racks, rails, trolleys, and carts
✔ Retail fixtures, displays, and industrial tubing
✔ Gym equipment, shelving, and office furniture

Wherever round tubing needs sealing and a clean, flush finish, Round Internal Tube Plugs — Conical Head provide a dependable, professional solution.

Need Other Tube Plug Shapes?

Matching ribbed plugs are also available for square and rectangular tubing.

Installation Tip

For best results, push the plug firmly into the tube and tap lightly with a rubber mallet until the conical head sits flush with the tube opening.