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
On wide rectangular tubing, a standard ribbed plug can bind or leave gaps. This one swaps PE ribs for a smooth PA body that slides in evenly across high-aspect-ratio profiles, seating flush on 80 to 100 mm wide tubes. For wide commercial bases and display fixtures. Black, grey, and white.
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 ↓
Standard rectangular tube plugs use PE ribs that compress during insertion. That works perfectly on most sizes. But on wide, shallow rectangular tubing (80 to 100 mm on the long side), the aspect ratio creates a problem: ribs that compress evenly on a 30 × 50 mm tube do not compress evenly on a 20 × 100 mm tube. The wide wall flexes differently than the narrow wall, leading to gaps, binding, or uneven seating. Smooth fit rectangular tube plugs solve this with a different material and a different insertion geometry.
PA (polyamide) construction instead of PE. A flush, precise insertion body instead of flexible ribs. The PA body slides into wide profiles with even contact across the entire cross-section. Smooth fit rectangular tube plugs are PA rectangular tube plugs engineered for the 4 specific wide-profile sizes that standard ribbed plugs cannot handle cleanly: 15 × 80, 20 × 80, 20 × 100, and 25 × 100 mm. Black, grey, and white.
Same three measurements as standard rectangular tube plugs: width (short side), length (long side), and wall thickness. Smooth fit rectangular tube plugs require one of the 4 specific size and wall combinations listed above. If your tube does not match, check standard rectangular tube plugs for a compatible size.
Use calipers or a ruler across each side of the rectangular tube, outside edge to outside edge. Record the short side (width) and the long side (length). Smooth fit rectangular tube plugs are available for widths of 15, 20, and 25 mm with lengths of 80 and 100 mm.
Use calipers at the tube end. Most smooth fit sizes require 1 to 2 mm wall. The 15 × requires 1.5 to 2 mm. The smooth PA body needs precise dimensional contact, so wall thickness accuracy matters more than with standard ribbed plugs.
Width, length, and wall thickness must all match. The smooth fit body has tighter dimensional tolerances than ribbed PE plugs because it relies on surface contact rather than rib compression for its grip.
Simpler than ribbed plugs. The smooth PA body slides into the tube with even contact across all surfaces. No ribs to compress means less insertion resistance and more even seating. Orientation still matters: match width to width and length to length.
The specific problem of wide-aspect-ratio rectangular tubing that standard ribbed plugs cannot handle evenly. The National Wood Flooring Association (NWFA) recommends protective measures on all furniture legs, and smooth fit rectangular tube plugs provide that protection on the wide structural tubing that standard plugs miss.
The primary advantage. On a 20 × 100 mm tube, the long wall is 5 times wider than the short wall. Standard PE ribs compress differently on each wall, creating uneven seating: the plug may gap on the long wall while binding on the short wall, or vice versa. Smooth fit rectangular tube plugs eliminate this problem with a flush PA body that contacts all four walls evenly. Wide profile tube plugs that seat correctly the first time. Rectangular tube plugs wide enough for commercial and industrial structural members.
Wide rectangular tubing is often used for table bases and fixture frames where the tube end contacts the floor with a broad footprint. The smooth PA head covers the full rectangular cross-section. Unlike leaving metal edges unprotected, the PA surface prevents scratching. PA has a lower coefficient of friction than PE, so smooth fit plugs actually glide more quietly on smooth, hard floors. For additional scratch protection, apply a rectangular self-adhesive furniture pad to the plug head.
Same complete seal as ribbed plugs. The smooth PA body fills the tube opening and prevents moisture, debris, dust, and insects from entering. On wide structural tubing that sits at floor level, the large tube opening is especially vulnerable to water, cleaning chemical runoff, and tracked-in debris. Smooth fit rectangular tube plugs seal the full opening.
PA (polyamide) brings properties that PE does not. Higher tensile strength: the body maintains shape across the full 80 to 100 mm width without flexing. Better chemical resistance: tolerates industrial cleaning agents, solvents, and commercial kitchen chemicals. Wider temperature range: stable from -40 °C to 85 °C compared to PE’s -25 °C to 65 °C. Lower friction coefficient: smoother floor contact. These are the smooth fit plugs for furniture and fixtures in demanding commercial and industrial environments.
Match the plug shape to your tube shape. Every shape uses the same press-fit concept with material and geometry optimized for the profile.
4 wide-profile sizes, 80 to 100 mm. PA.
| Fits Tube (W) | Fits Tube (L) | Tube Wall Thickness (T) |
|---|---|---|
| 15 mm (0.59″) | 80 mm (3.15″) | 1.5 to 2 mm (0.06″ to 0.08″) |
| 20 mm (0.79″) | 80 mm (3.15″) | 1 to 2 mm (0.04″ to 0.08″) |
| 20 mm (0.79″) | 100 mm (3.94″) | 1 to 2 mm (0.04″ to 0.08″) |
| 25 mm (0.98″) | 100 mm (3.94″) | 1 to 2 mm (0.04″ to 0.08″) |
Tube wall thickness is a fit requirement, not a tolerance.
| Specification | Detail |
|---|---|
| Material | Polyamide, a harder plastic that holds its shape under load |
| Sizes | 4 sizes |
| Width (W) | 15 to 25 mm (0.59″ to 0.98″) |
| Length (L) | 80 to 100 mm (3.15″ to 3.94″) |
| Height (H) | 14 mm (0.55″) |
| Head height (H1) | 5 mm (0.20″) |
| Tube wall thickness (T) | 1 to 2 mm (0.04″ to 0.08″) |
| Mounting | Pushes into the tube, held by ribs |
| Colors | Black, Gray, White |
| Floor compatibility | Hollow tube legs |
| Minimum order | Sold in a minimum of 4, then any quantity you need |
Standard rectangular tube plugs use PE with flexible ribbed walls that compress during insertion. Smooth fit rectangular tube plugs use PA (polyamide) with a flush-profile body engineered for wide tubes. On profiles 80 to 100 mm long, standard ribs may not compress evenly across the full width, leading to gaps on one axis or binding on the other. The smooth PA body provides more even seating across the entire cross-section.
The hold mechanism is different. Smooth fit rectangular tube plugs rely on precise dimensional matching between the PA body and the tube interior rather than rib compression. The fit is firm and sufficient for all standard furniture applications. For environments with extreme vibration or pull-out force, standard ribbed plugs in a matching size would provide stronger retention.
PA (polyamide) has higher tensile strength and rigidity than PE. On wide profiles, the body needs to maintain its shape across 80 to 100 mm without flexing or warping during insertion. PA holds its geometry. PE would flex too much at these widths. PA also handles a wider temperature range and has better chemical resistance than PE.
Standard rectangular tube plugs are available up to 60 × 120 mm, but none cover the specific 15 × 80, 20 × 80, 20 × 100, or 25 × 100 dimensions. These sizes are only available as smooth fit. Even if a close standard size existed, the wide aspect ratio would make ribbed insertion uneven.
Commercial table bases, conference table frames, heavy-duty display fixtures, industrial workbenches, retail shelving supports, and architectural structural elements. The wide, shallow profile distributes load across a broad footprint. These are not typical chair legs. They are structural members on larger, heavier furniture and fixtures.
Smooth Fit Rectangular 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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