Hospitality-grade floor protection · Sizing help before you order · Apply for a business account
Sizing help · Apply for a business account
Hospitality-grade floor protection · Sizing help before you order · Apply for a business account
Sizing help · Apply for a business account
A flat plug ends a visible tube with a hard, blunt edge. This one curves gently outward into a soft dome, giving exposed leg tops, frame ends, and chair backs an organic, finished look. The ribbed PE body press-fits the same way as the flat range. Black and grey.
We make this size in production runs, so there is none on the shelf today. Tell us how many you would want and you go on the list for it. When enough people ask for a size, we run it, and the people who asked hear about it first.
We stock a limited range of tube sizes and wall thicknesses. Tell us the size you need and we will confirm availability and pricing by email.
Buying in volume? See business pricing & samples ↓
Sometimes sold as dome ribbed tubing plugs, these close a round leg with a rounded head and grip the inside wall on flexible PE ribs. Standard flat head tube plugs seal and finish the tube end, but they add nothing to the look. Domed head round tube plugs give hollow round furniture legs a smooth, rounded decorative finish that turns a plain tube end into a deliberate design detail. The dome curves gently outward from the tube edge, creating a soft, organic endpoint on chair backs, exposed frame tops, fixture ends, and any tube end that is visible to the user. The most subtle of the decorative head profiles: enough curve to signal intentional design without dominating the visual.
Same PE construction and flexible ribbed body as the flat head range. Same press-fit installation. The only difference is the head: a smooth rounded dome instead of a flat disc. Domed head round tube plugs are decorative dome tube plugs for furniture where a subtle, rounded finish adds the right detail. : Ø 16 mm (R20 dome) and Ø 26 mm (R40 dome). Wall thickness 1.5 to 2 mm. Black and grey.
Same two-measurement process as all tube plugs: outside diameter (OD) and wall thickness. Domed head round tube plugs require either Ø 16 mm or Ø 26 mm OD, both with 1.5 to 2 mm wall thickness. If your tube does not match these specifications, check the other head styles for a compatible size.
Use calipers or a ruler across the widest point of the tube opening. Outside edge to outside edge. The OD must be Ø 16 mm or Ø 26 mm for these plugs to fit.
Use calipers at the tube end, or calculate: (OD minus ID) / 2. The wall thickness must be between 1.5 mm and 2 mm for both sizes. Outside this range, the ribs will not grip properly.
Ø 16 mm OD gets the R20 dome. Ø 26 mm OD gets the R40 dome. Both require 1.5 to 2 mm wall. If your tube is Ø 16 mm with 1 to 1.5 mm walls, use a flat head plug in that wall thickness range instead.
Same press-fit installation as all our tube plugs. The domed head does not change the process. At 1.5 to 2 mm wall thickness, most these plugs press in by hand. A rubber mallet provides extra seating force if needed.
Every benefit of a standard tube plug, plus a rounded decorative profile that transforms exposed tube ends from unfinished holes into intentional design details. The National Wood Flooring Association (NWFA) recommends protective measures on all furniture legs, and these plugs contribute by sealing the tube end even on non-floor-contact applications.
The primary reason to choose domed over flat. The rounded profile adds a soft, organic visual to exposed tube ends. On retail fixtures, restaurant seating, hospitality furniture, and showroom displays, visible tube ends communicate design intention rather than incomplete assembly. Domed head round tube plugs are the most subtle of the decorative head options. The gentle curve reads as intentional without being dramatic. These are the decorative round tube plugs with a dome profile that blends with rather than dominates the frame design. Available in black and grey to match or contrast with the frame finish.
Same sealed end as flat head plugs. The domed profile does not affect the seal. Moisture, debris, and insects are kept out of the tube interior. On steel tubing, this prevents the internal corrosion that weakens the structure from the inside out. Domed head round tube plugs protect the tube interior regardless of orientation. Unlike leaving furniture hardware unprotected, sealed ends extend the life of the frame.
Same resonance reduction as flat head plugs. The PE body fills the tube opening and absorbs the vibration that hollow, open tubes amplify. In environments with many metal-framed chairs, every sealed tube end reduces the cumulative metallic noise. Domed head round tube plugs provide the same acoustic benefit as flat head plugs with an upgraded visual.
The rounded dome concentrates floor contact at the dome center instead of distributing weight across a flat surface. For floor-contact legs, use flat head round tube plugs that spread load evenly. For floor contact with dedicated scratch protection, use pad slot round tube plugs with a PA6 pad insert. Domed head round tube plugs are designed for the visible tube ends that do not touch the floor.
All head styles share the same PE body and ribbed grip. The choice comes down to appearance, floor contact needs, and the specific visual effect you want on the exposed tube end. Here is how these plugs compare.
Flat head round tube plugs sit flush with the tube end. No protrusion, no visual accent. Domed head round tube plugs add a gentle rounded curve above the tube edge. Choose flat for floor-contact legs and utilitarian applications. Choose domed for visible, decorative tube ends where the subtle curve adds design value without dominating.
Conical head round tube plugs taper to a sharper geometric peak. More angular, more architectural. Domed head round tube plugs have a softer, rounder profile. The dome is more traditional and organic. The cone is more modern and geometric. Conical is Ø 30 mm only. Domed comes in Ø 16 and Ø 26 mm.
Half-sphere head round tube plugs have a full hemisphere that protrudes significantly above the tube edge. Bold, pronounced, unmistakable. Domed head round tube plugs are more restrained. The dome rises less and curves more gently. If you want subtle, choose domed. If you want dramatic, choose half-sphere. Half-sphere is available in from Ø 16 to Ø 30 mm.
Anti-slip TPE round tube plugs have a rubber head that grips the floor. Functional, not decorative. Domed head round tube plugs are decorative, not functional on floors. On the same piece of furniture, you might use anti-slip on the floor-contact legs and domed on the visible back uprights or armrest ends.
Every variant uses the same internal ribbed PE body. The head determines appearance, floor contact capability, and specialized function.
Flush finish. Ø 10 to 80 mm. Best for floor contact and general use.
Rounded dome. Ø 16 and 26 mm. Subtle decorative finish in black and grey.
| Fits Tube (Ø) | Insert Depth (H) | Head Height (H1) |
|---|---|---|
| 16 mm (0.63″) | 12 mm (0.47″) | 5 mm (0.20″) |
| 26 mm (1.02″) | 14 mm (0.55″) | 8 mm (0.31″) |
Tube wall thickness is a fit requirement, not a tolerance.
| Specification | Detail |
|---|---|
| Material | Polyethylene, a tough low-friction plastic |
| Sizes | 2 sizes |
| Diameter (Ø) | 16 to 26 mm (0.63″ to 1.02″) |
| Height (H) | 12 to 14 mm (0.47″ to 0.55″) |
| Head height (H1) | 5 to 8 mm (0.20″ to 0.31″) |
| Tube wall thickness (T) | 1.5 to 2 mm (0.06″ to 0.08″) |
| Mounting | Pushes into the tube, held by ribs |
| Colors | Black, Gray |
| Floor compatibility | Hollow tube legs |
| Minimum order | Sold in a minimum of 4, then any quantity you need |
R20 and R40 refer to the dome radius in millimeters. The Ø 16 mm plug has a 20 mm dome radius (R20), which produces a gentle, subtle curve. The Ø 26 mm plug has a 40 mm dome radius (R40), which produces a slightly flatter, broader dome proportional to the larger tube diameter. Both create a smooth, rounded appearance. The dome radius determines how pronounced the curve looks on the finished tube end.
The dome is a gentle, rounded curve that rises modestly above the tube edge. Conical head plugs taper to a sharper geometric peak. Half-sphere head plugs have a full hemisphere that protrudes further. The dome is the most subtle of the three decorative profiles. It adds a finished look without dominating the visual.
Not ideal. The rounded profile concentrates floor contact at the dome’s center instead of distributing weight across a flat surface. For floor-contact legs, use flat head round tube plugs that spread load evenly. For floor contact with scratch protection, use pad slot round tube plugs. Domed head round tube plugs are designed for visible, non-floor-contact tube ends.
These two colors cover the vast majority of commercial and residential furniture frame finishes. Black matches dark steel, powder-coated, and anodized frames. Grey blends with brushed steel, aluminum, and lighter metallic finishes. For white or custom colors, contact us through Business Solutions.
Yes. This is one of the most common applications. Use domed head round tube plugs on the chair back uprights, armrest ends, or exposed frame tops where the decorative profile is visible. Use flat head plugs on the floor-contact legs where load distribution matters. All head styles use the same PE body and ribbed grip.
Yes. Dome ribbed tubing plugs is the name some catalogues use for this part. A rounded head closes the tube, and flexible PE ribs down the body grip the inside wall so it stays put.
Domed Head Round Tube Plugs
Outfitting a hotel, restaurant, school, healthcare facility, or large furniture build? Superior Glide supports volume orders with bulk pricing tiers, free physical samples, and dedicated quote pricing for accounts placing larger orders.
Bulk pricing tiers, net terms for qualified buyers, and dedicated support for facility managers and procurement teams.
Hold the product, test the fit, check the finish. We ship samples free so you can evaluate before committing to a full order.
For orders above standard volume tiers, we’ll prepare a custom quote with consolidated shipping and your account’s tier pricing.
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