Round Internal Tube Plugs — Flat Head provides a secure, professional finish for open tube ends on furniture, equipment, and metal frames. Made from durable polyethylene and engineered with flexible ribbed sides, they create a tight friction-fit seal — no tools, glue, or screws required. Ideal for protecting floors, reducing vibration, and sealing tube interiors from dust and moisture.
Not sure what size? See the size chart ↓
📦 Sold in packs of 4 — quantity adjustable at checkout
Round Internal Tube Plugs — Flat Head are designed to solve one of the most common problems with open tubing: exposed ends that scratch floors, collect moisture, and cause frames to rattle during everyday use. Bare metal edges wear down surfaces over time, while hollow legs amplify noise and vibration — especially on chairs, racks, fixtures, and equipment that move frequently.
Instead of loose caps or brittle plastic ends, Round Internal Tube Plugs — Flat Head press securely inside round tubing to create a clean, finished appearance. Flexible internal ribs form a tight friction fit that stays in place without glue, screws, or tools — sealing the tube while improving stability and noise control.
Cheap caps crack. Loose plugs fall out. Tape and makeshift fixes fail quickly. And once they do, the tube is exposed again. Even light movement can bring scratching, rattling, and wear right back.
Round Internal Tube Plugs — Flat Head provide a long-term solution using durable polyethylene construction and a ribbed design that adapts to different tube wall thicknesses. Whether used on furniture, fixtures, or industrial frames, they keep tubing sealed, quiet, and protected.
If your frames rattle…
If exposed tube ends scratch floors…
If caps loosen or fall out over time —
These plugs are built to finish the job properly.
Your tubing looks finished. Your floors stay protected. And your furniture or equipment stays quieter, cleaner, and more stable.
Flexible internal ribs compress against the tube wall, creating a tight, non-slip fit that stays firmly seated through regular movement and load-bearing use.
The smooth polyethylene base prevents metal-to-floor contact, reducing noise and protecting hard surfaces from scratching or abrasion.
Simply press the plug into the tube opening or tap it in with a rubber mallet. No adhesives, screws, or special tools required.
Designed to accommodate slight size variations while maintaining a tight internal grip that resists loosening over time.
Lightweight yet impact-resistant, waterproof, and corrosion-proof — ideal for commercial, industrial, and residential environments.
Resists cracking, chemicals, moisture, and temperature shifts from –25 °C to 65 °C, ensuring consistent performance indoors or out.
Sizes:
• Ø10 mm to Ø80 mm
• Fits wall thicknesses from 1 mm to 4 mm
Colors:
• Black — classic and versatile
• Grey — neutral and modern
• White — clean, ideal for visible installations
Fit Tip: Measure the inner diameter and wall thickness of your tube to ensure a snug ribbed fit. No trimming or modification required.
✔ Chairs, stools, and tables
✔ Retail fixtures and display racks
✔ Industrial frames and machinery
✔ Gym and fitness equipment
✔ Office furniture and metal structures
Wherever round tubing is used, Round Internal Tube Plugs — Flat Head deliver a cleaner finish, quieter performance, and dependable protection.
Matching ribbed plugs are also available for square and rectangular tubing profiles.
For the most secure seating, tap the plug lightly with a rubber mallet until it sits flush — especially on thicker-walled tubing.
| Specification | Details |
|---|---|
|
Product Type
|
Tube Plug – Inner with Ribs
|
|
Shape
|
Round Tube
|
|
Material
|
PE (Polyethylene)
|
|
Fit Style
|
Ribbed friction-fit
|
|
Installation Method
|
Push-in by hand or tap with rubber mallet — no tools, glue, or screws needed
|
|
Furniture Compatibility
|
All hard and soft flooring
|
|
Floor Compatability
|
Chairs, stools, tables, carts, racks, shelving, fitness equipment, industrial frames
|
|
Leg Compatibility
|
Metal and plastic round tubing
|
|
Sizes Available
|
Ø10 mm to Ø80 mm diameters, wall thicknesses from 1 mm to 4 mm
|
|
Color Options
|
Black, Grey, White
|
|
Indoor / Outdoor
|
Indoor | Covered Outdoor | Uncovered Outdoor
|
|
Key Benefits
|
Seals tube ends, prevents vibration, resists wear, moisture, and corrosion
|
|
Recyclable
|
Yes
|
| Outer Tube Diameter (Ø) | Tube Wall Thickness (T) | Insert Depth (H) | Head Height (H1) |
|---|---|---|---|
|
10 mm (0.39")
|
1 – 1.5 mm (0.04″ – 0.06″)
|
6 mm (0.24")
|
3.2 mm (0.12")
|
|
10 mm (0.39")
|
1.5 – 2 mm (0.06" – 0.08")
|
6 mm (0.24")
|
3.2 mm (0.12")
|
|
13 mm (0.51")
|
1 – 1.5 mm (0.04" – 0.06")
|
6 mm (0.24")
|
3.2 mm (0.12")
|
|
13 mm (0.51")
|
1.5 – 2 mm (0.06" – 0.08")
|
6 mm (0.24")
|
3.2 mm (0.12")
|
|
16 mm (0.63")
|
1 – 1.5 mm (0.04" – 0.06")
|
12 mm (0.47")
|
3 mm (0.11")
|
|
16 mm (0.63")
|
2 – 2.5 mm (0.08" – 0.10")
|
12 mm (0.47")
|
3 mm (0.11")
|
|
17.2 mm (0.68")
|
2 – 2.5 mm (0.08" – 0.10")
|
12 mm (0.47")
|
3 mm (0.11")
|
|
18 mm (0.71")
|
1 – 1.5 mm (0.04" – 0.06")
|
12 mm (0.47")
|
3 mm (0.11")
|
|
20 mm (0.79")
|
1 – 1.5 mm (0.04" – 0.06")
|
12 mm (0.47")
|
3 mm (0.11")
|
|
20 mm (0.79")
|
1.5 – 2.5 mm (0.06" – 0.10")
|
13 mm (0.51")
|
3 mm (0.11")
|
|
22 mm (0.87")
|
1 – 1.5 mm (0.04" – 0.06")
|
12 mm (0.47")
|
5 mm (0.20")
|
|
22 mm (0.87")
|
2 – 2.5 mm (0.08" – 0.10")
|
12 mm (0.47")
|
5 mm (0.20")
|
|
22 mm (0.87")
|
2.5 – 3 mm (0.10" – 0.12")
|
12 mm (0.47")
|
5 mm (0.20")
|
|
25 mm (0.98")
|
1 – 1.5 mm (0.04" – 0.06")
|
12 mm (0.47")
|
5 mm (0.20")
|
|
27 mm (1.06")
|
2.5 – 3 mm (0.10" – 0.12")
|
12 mm (0.47")
|
5 mm (0.20")
|
|
28 mm (1.10")
|
1 – 2 mm (0.04" – 0.08")
|
12 mm (0.47")
|
5 mm (0.20")
|
|
30 mm (1.18")
|
1.5 – 2 mm (0.06" – 0.08")
|
12 mm (0.47")
|
5 mm (0.20")
|
|
32 mm (1.26")
|
1.5 – 2 mm (0.06" – 0.08")
|
12 mm (0.47")
|
5 mm (0.20")
|
|
33.7 mm (1.33")
|
1.5 – 2 mm (0.06" – 0.08")
|
12 mm (0.47")
|
5 mm (0.20")
|
|
33.7 mm (1.33")
|
3 – 4 mm (0.12" – 0.16")
|
12 mm (0.47")
|
5 mm (0.20")
|
|
35 mm (1.38")
|
1 – 2 mm (0.04" – 0.08")
|
12 mm (0.47")
|
5 mm (0.20")
|
|
38 mm (1.50")
|
1 – 2 mm (0.04" – 0.08")
|
12 mm (0.47")
|
5 mm (0.20")
|
|
40 mm (1.57")
|
1.5 – 2.5 mm (0.06" – 0.10")
|
12 mm (0.47")
|
5 mm (0.20")
|
|
42 mm (1.65")
|
1 – 1.5 mm (0.04" – 0.06")
|
12 mm (0.47")
|
5 mm (0.20")
|
|
42 mm (1.65")
|
1 – 1.5 mm (0.04" – 0.06")
|
12 mm (0.47")
|
5 mm (0.20")
|
|
42 mm (1.65")
|
1 – 2 mm (0.04" – 0.08")
|
12 mm (0.47")
|
5 mm (0.20")
|
|
45 mm (1.77")
|
1.5 – 2.5 mm (0.06" – 0.10")
|
14 mm (0.55")
|
5 mm (0.20")
|
|
48.3 mm (1.90")
|
1 – 2 mm (0.04" – 0.08")
|
14 mm (0.55")
|
5 mm (0.20")
|
|
50 mm (1.97")
|
1.5 – 2 mm (0.06" – 0.08")
|
14 mm (0.55")
|
5 mm (0.20")
|
|
50 mm (1.97")
|
3 – 4 mm (0.12" – 0.16")
|
14 mm (0.55")
|
5 mm (0.20")
|
|
60 mm (2.36")
|
1.5 – 2 mm (0.06" – 0.08"
|
14 mm (0.55")
|
5 mm (0.20")
|
|
60 mm (2.36")
|
1.5 – 2.5 mm (0.06" – 0.10")
|
14 mm (0.55")
|
5 mm (0.20")
|
|
60.3 mm (2.37")
|
1.5 – 2.5 mm (0.06" – 0.10")
|
14 mm (0.55")
|
5 mm (0.20")
|
|
63 mm (2.48")
|
1.5 – 2.5 mm (0.06" – 0.10")
|
14 mm (0.55")
|
5 mm (0.20")
|
|
70 mm (2.76")
|
1.5 – 2 mm (0.06" – 0.08")
|
14 mm (0.55")
|
5 mm (0.20")
|
|
77 mm (3.03")
|
2.5 – 3.5 mm (0.12" – 0.14")
|
14 mm (0.55")
|
5 mm (0.20")
|
|
80 mm (3.15")
|
1.5 – 2 mm (0.06" – 0.08")
|
14 mm (0.55")
|
5 mm (0.20")
|
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