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Drilled a hole you no longer need? Left a knockout open in a panel? These rubber round hole plugs are the fastest, tool-free fix. Push one in by hand and the flexible rubber compresses, then expands to grip the hole walls — leaving a smooth, domed surface that looks intentional rather than forgotten. Whether you're tidying up a DIY electronics enclosure, sealing a cabinet cutout, or finishing an automotive interior panel, these plugs get the job done in seconds.
Available in three metric sizes — 9 mm (~3/8 in), 10 mm (~13/32 in), and 11 mm (~7/16 in) — and in black or white to match your project. Pack sizes range from 1 to 1,000 pieces, so you can grab a handful for a one-off repair or stock up for production runs and workshop use.
Common applications include covering screw holes in furniture and cabinetry, blanking unused panel knockouts in electrical enclosures, sealing pipe ends, plugging door and window drill holes, and finishing automotive interior trim panels where a clean, dust-free surface matters.
Cover unused screw holes in furniture, cabinetry, shelving, and trim. A quick push-fit plug is cleaner than wood filler and takes zero drying time.
Blank unused knockout holes in electrical panels, project boxes, and equipment enclosures. Keeps dust and debris out of sensitive components.
Seal holes in interior panels, door cards, and dashboard trim. The rubber flexes to fit curved surfaces and stays put under normal vibration.
Stock bulk packs for production lines, installation crews, or workshop use. Consistent sizing and reliable fit across metal, plastic, and wood substrates.
| Product Type | Rubber round hole plug / blanking seal / button screw cap cover |
|---|---|
| Material | Flexible rubber |
| Shape | Round with slight domed (micro-arc) top surface |
| Available Sizes (hole diameter) | 9 mm (~3/8 in), 10 mm (~13/32 in), 11 mm (~7/16 in) |
| Colors | Black, White |
| Pack Sizes Available | 1, 5, 10, 20, 50, 100, 200, 500, 1,000 pcs |
| Installation Method | Push-fit by hand — no tools or adhesive required |
| Compatible Material Thickness | Typically up to 3–4 mm (sheet metal, thin panels, plastic) |
| Sealing Properties | Dustproof, water-resistant (splash-proof; not for submersion) |
| Typical Applications | Screw holes, panel knockouts, pipe ends, door/window drill holes, electronics enclosures, automotive trim, furniture |
Measure the diameter of the hole with calipers or a ruler. Select the plug that matches your hole size — for example, a 10 mm plug for a 10 mm hole. The rubber is slightly compressible, so each size accommodates minor variation (typically ±0.5 mm). If your hole falls between sizes, choose the smaller plug for a tighter grip.
They are dustproof and water-resistant — suitable for rain, splashes, and outdoor humidity. They are not designed for constant submersion or high-pressure water exposure. For outdoor furniture, garden equipment, patio enclosures, and automotive exteriors, they perform well under normal weather conditions.
No. The friction fit is sufficient for most applications. The rubber compresses on insertion and expands against the hole walls to hold itself in place. In high-vibration environments (engine covers, moving panels), a small dot of silicone adhesive can add extra security, but this is rarely necessary for standard DIY and furniture use.
Yes. The rubber's flexibility allows it to conform slightly to curved surfaces. On thin sheet metal (such as car body panels or HVAC ducts), the plug grips because the rubber pushes outward against the hole edge. They work best when the material thickness is up to approximately 3–4 mm.
Yes. Rubber can be painted with flexible paints such as vinyl dye or rubber-compatible spray paint. Use an adhesion promoter for best results. The white plugs are particularly easy to tint to other colors. For most projects, the black and white options cover the majority of needs without painting.
The plugs are identical in size, material, and function — only the color differs. Black suits dark equipment, automotive interiors, industrial panels, and workshop projects. White blends into white furniture, appliances, light-colored cabinetry, and office equipment. Choose based on which color will be less visible in your application.
Yes. Each variant is a single size and color combination. Select your size (9 mm, 10 mm, or 11 mm), your color (Black or White), and your pack quantity from the dropdowns above. All pieces in a pack are identical.
