Conical head round tube plugs give hollow round furniture legs a tapered, decorative finish instead of a plain flat end. The cone rises from the tube edge to a smooth central peak, adding visual depth to chair backs, exposed frame ends, fixture tops, and any tube end that is visible to the user. Same PE construction and flexible ribbed body as the flat head range. Same press-fit installation. Decorative tube plugs for furniture where appearance matters as much as function. Ø 30 mm, wall thickness 3 to 4 mm. Black (RAL 9005). Sold in multiples of 4.
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📦 Sold in packs of 4 — quantity adjustable at checkout
Standard flat head tube plugs seal and finish the tube end, but they add nothing to the look. Conical head round tube plugs give hollow round furniture legs a tapered, raised profile that turns a plain tube end into a deliberate design detail. The cone rises from the tube edge to a smooth central peak, adding visual depth to chair backs, exposed frame ends, fixture tops, and any tube end that is visible to the user. Decorative tube plugs for furniture where appearance matters as much as function.
Same PE construction and flexible ribbed body as the flat head range. Same press-fit installation. The only difference is the head: a tapered cone instead of a flat disc. Conical head round tube plugs are available in one size: Ø 30 mm with 3 to 4 mm wall thickness. Black (RAL 9005). Tapered tube end plugs for hollow round tubing where the tube end is visible. Sold in multiples of 4.
Conical head round tube plugs are currently available in one size. The Ø 30 mm diameter with 3 to 4 mm wall thickness covers one of the most common heavy-duty furniture tubing specifications used in commercial seating and display fixtures.
Wall thickness: 3 to 4 mm. Height: 14 mm (body), 20 mm (total with cone). Color: Black (RAL 9005). Material: PE (polyethylene). This conical head round tube plug fits the most common commercial and residential round tubing profile for visible tube ends.
For other diameters with a flat finish, flat head round tube plugs come in 26 sizes from Ø 10 mm to Ø 80 mm. For a rounded dome, domed head round tube plugs are available in Ø 16 and Ø 26 mm. For a full hemisphere, half-sphere head round tube plugs come in 5 sizes from Ø 16 to Ø 30 mm. For custom conical sizes or colors, contact Business Solutions.
Same two-measurement process as all tube plugs: outside diameter (OD) and wall thickness. Conical head round tube plugs require Ø 30 mm OD with 3 to 4 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 30 mm for conical head round tube plugs to fit.
Use calipers at the tube end, or calculate: (OD minus ID) / 2. The wall thickness must be between 3 mm and 4 mm for the ribs to grip properly.
Ø 30 mm OD and 3 to 4 mm wall. If your tube is Ø 30 mm but with 1 to 2 mm walls, the conical head plug will not grip. Use a flat head plug sized for Ø 30 mm / 1.5 to 2 mm wall instead.
Same press-fit installation as all our tube plugs. The conical head does not change the process. A rubber mallet is recommended for the 3 to 4 mm wall thickness range, as the fit is snug. Conical head round tube plugs install in seconds per tube end.
Every benefit of a standard tube plug, plus a 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 conical head round tube plugs contribute by sealing the tube end even on non-floor-contact applications.
The primary reason to choose conical over flat. The tapered profile adds geometric interest to exposed tube ends. On retail fixtures, restaurant seating, hospitality furniture, and showroom displays, visible tube ends communicate design intention rather than incomplete assembly. Conical head round tube plugs turn functional hardware into a finishing detail. The smooth PE cone takes the same black finish as the rest of the plug body. These are the decorative round tube plugs that retail and hospitality environments demand.
Same sealed end as flat head plugs. The conical 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. Conical head round tube plugs protect the tube interior regardless of whether the tube end faces up, down, or sideways. 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 (restaurants, cafeterias, conference rooms), every sealed tube end reduces the cumulative metallic noise. Conical head round tube plugs provide the same acoustic benefit as flat head plugs with a design-forward visual upgrade.
The tapered cone concentrates floor contact at the center peak 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. Conical head round tube plugs are designed for the visible tube ends that do not touch the floor.
Same PE (polyethylene) body and flexible ribbed grip as every tube plug in the range. The only difference is the head profile. Conical head round tube plugs are molded from a single piece of PE with no joints, seams, or separate components. Conical tube plugs for metal legs that combine a decorative head with an engineered friction-fit body.
The tapered cone rises approximately 6 mm above the tube edge at its highest point. Smooth, molded surface with no seam lines. The black PE finish matches the body and integrates visually with black-finished metal tubing. On chrome, silver, or colored tubing, the black cone provides a deliberate contrast accent. Conical head round tube plugs use the same PE compound that resists UV, chemicals, moisture, and impact across all our plug products.
Identical rib structure to the flat head range. The ribs compress during insertion and expand against the inner tube wall for a secure friction fit. On the 3 to 4 mm wall thickness specified for conical head round tube plugs, the ribs engage deeply for a firm grip. No adhesive, no screws, no tools beyond an optional rubber mallet.
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 conical head round tube plugs compare.
Flat head round tube plugs sit flush with the tube end. No protrusion, no visual accent. Conical head round tube plugs add a tapered peak that rises 6 mm above the tube edge. Choose flat for floor-contact legs and utilitarian applications. Choose conical for visible, decorative tube ends where the tapered profile adds design value.
Domed head round tube plugs have a rounded, bubble-like curve. Softer, more organic appearance. Conical head round tube plugs have a sharper, more angular geometric profile. The cone is more modern and architectural. The dome is more traditional and subtle. Domed heads are available in Ø 16 and Ø 26 mm. Conical is Ø 30 mm only.
Half-sphere head round tube plugs have a full hemisphere profile for maximum decorative effect. The half-sphere protrudes more than the cone and creates a bold, rounded endpoint. Conical head round tube plugs are more restrained. The taper is subtle enough to add interest without dominating. Half-sphere is available in 5 sizes from Ø 16 to Ø 30 mm.
Anti-slip TPE round tube plugs have a rubber head that grips the floor. Functional, not decorative. Conical 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 conical on the visible back uprights.
Pad slot round tube plugs have a recessed channel that accepts a PA6 pad for floor-specific scratch protection. Functional, flat-profile design. Conical head round tube plugs offer no pad slot and are not designed for floor contact. For the same piece of furniture, pad slot plugs handle the floor-contact legs while conical head round tube plugs finish the visible, non-floor-contact ends.
Conical head round tube plugs are designed for tube ends that are visible to the user but do not contact the floor. The tapered profile is a decorative choice, not a functional floor-contact solution.
Every variant uses the same internal ribbed PE body. The head determines appearance, floor contact capability, and specialized function.
Flush finish. 26 sizes, Ø 10 to 80 mm. Best for floor contact and general use.
Tapered peak. Ø 30 mm. Decorative, non-floor-contact applications.
Anywhere Ø 30 mm hollow round tubing has a visible, non-floor-contact end that deserves a finished, decorative look. Conical head round tube plugs add a design-forward finishing detail to commercial and residential furniture, fixtures, and structures.
Restaurant and hospitality seating where chair backs are visible to guests. Office and conference room chairs with exposed metal back uprights. Residential dining chairs with tubular metal frames. Any seating where the tube ends on the non-floor-contact portions of the frame are visible. Conical head round tube plugs pair well with flat head plugs on the same chair: conical on the visible back, flat on the floor-contact legs. For floor-contact legs that also need scratch protection, pair with round self-adhesive furniture glides.
Retail display racks, showroom fixtures, exhibition frames, trade show structures, garden features, and architectural elements. Any Ø 30 mm round tubing that faces the viewer. Available in bulk for manufacturing runs and commercial fit-outs. For commercial pricing, visit Business Solutions.
Conical head round tube plugs require almost no maintenance. The PE material does not degrade under normal indoor or outdoor conditions. The conical surface can be wiped clean with a damp cloth. Check periodically that the plug remains seated flush with the tube edge. The cone tip is the most exposed point: inspect for damage from impact or stacking contact. If the cone is chipped or deformed, replace the plug.
On commercial furniture that gets moved, stacked, or handled frequently, inspect every 3 to 6 months. On static fixtures and display structures, an annual visual check is enough. Conical head round tube plugs are sold in multiples of 4, so keeping spares on hand for commercial environments is practical. In high-traffic hospitality and retail environments, the conical profile may accumulate dust or fingerprints more visibly than a flat head because the tapered surface catches light at different angles. A quick wipe restores the clean finish. The PE surface does not stain, discolor, or absorb cleaning products.
Round Tube Plugs (Flat Head): flush finish, 26 sizes from Ø 10 mm to Ø 80 mm. The right choice for floor-contact legs on the same furniture that uses conical head round tube plugs on the visible ends.
Round Threaded Inserts: press-fit plug with threaded metal nut for adjustable leveling feet.
| Specification | Details |
|---|---|
Product Type |
Tube Plug – Inner Conical Head |
Shape |
Round Tube |
Material |
PE (Polyethylene) |
Fit Style |
Friction-fit ribbed compression |
Floor Compatibility |
All hard and soft floors |
Furniture Compatibility |
Chairs, stools, tables, workstations, racks, carts |
Leg Compatibility |
Metal and plastic round tubing |
Sizes Available |
Ø30 mm (for 3–4 mm wall thickness) |
Color Options |
Black |
Installation Type |
Press-fit (hand or rubber mallet) |
Key Benefits |
Flush finish, vibration-resistant, waterproof, durable |
Indoor/Outdoor Use |
Indoor | Covered Outdoor | Uncovered Outdoor |
Recyclable |
Yes |
| Ø (Tube Diameter) | T (Tube Wall Thickness) | H (Insert Depth) | H1 (Head Height) |
|---|---|---|---|
30 mm (1.18") |
3 – 4 mm (0.12" – 0.16") |
14 mm (0.55") |
20 mm (0.79") |
The conical head tapers upward from the tube edge to a raised center point, creating a subtle geometric peak. Flat head plugs sit flush with no protrusion. Domed heads have a rounded, bubble-like curve. The conical profile is sharper and more angular than a dome but less dramatic than a half-sphere. It adds visual interest without dominating the design. Conical head round tube plugs work best on visible, non-floor-contact tube ends.
Not ideal. The tapered profile concentrates floor contact at the center peak instead of distributing weight across a flat surface. For floor-contact legs, flat head round tube plugs distribute weight evenly. For floor-contact legs that also need scratch protection, use pad slot round tube plugs. Conical head round tube plugs are best for visible, non-floor-contact tube ends like chair backs and exposed frame tops.
Currently Ø 30 mm with 3 to 4 mm wall thickness in black only. For other diameters with a decorative finish, domed head plugs come in Ø 16 mm and Ø 26 mm, and half-sphere head plugs come in 5 sizes from Ø 16 mm to Ø 30 mm. For custom conical sizes or colors, contact us through Business Solutions.
It can. The raised cone protrudes approximately 6 mm above the tube edge. If furniture stacks by nesting tube ends, the cone may prevent flush stacking. Check that the protrusion does not interfere with your stacking geometry. For stackable furniture, flat head plugs are the better choice.
Yes. Same PE body with flexible internal ribs. Same press-fit installation: align, push, seat flush. Same chemical resistance, UV stability, and impact resistance. The only difference is the head profile. A rubber mallet is recommended for the 3 to 4 mm wall thickness as the fit is snug.
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