Screw caps and hole cover plugs are the finishing touch that separates a polished DIY project from one that looks half-done — they hide exposed fastener heads, seal unused drill holes, and protect furniture surfaces from moisture, snags, and wear. Whether you're assembling flat-pack furniture, mounting a mirror, capping chair legs, or tidying up a cabinet installation, the right cap makes the difference between a result you're proud of and one you keep meaning to fix.
Plastic Push-Fit Screw Hole Cover Caps for Furniture & Cabinetry
Push-fit plastic screw caps are the most common finishing hardware in flat-pack and custom furniture. They snap into a pre-drilled hole with a friction-fit plug, covering the screw head cleanly without adhesive. Our range covers hole diameters from 5mm to 40mm and comes in black, white, and brown to match the three most common furniture board finishes. The 100-pack option is ideal for large projects like wardrobes, bookshelves, or kitchen cabinet installations where you need consistent coverage across dozens of fittings. Because they're tool-free and removable, they're also practical for furniture you may disassemble and move.
Self-Adhesive Decorative Cam Cover Caps for Flat-Pack Assembly
The 21mm self-adhesive decorative screw hole cover cap is sized specifically for the cam lock fittings used in most flat-pack furniture — the round metal connectors that hold panels together in IKEA-style assembly. These caps stick directly over the cam fitting once it's tightened, hiding the slot and giving the panel face a seamless finish. They're available in white to blend with light-colored furniture boards and apply in seconds with no tools. If you've ever assembled a bookcase and been left staring at rows of exposed cam fittings, these are the fix.
Stainless Steel Mirror Screw Cover Caps for Glass & Wall Mounting
When mounting mirrors, glass panels, or framed artwork directly to a wall with exposed screws, a decorative mirror screw cover cap transforms a functional fastener into a design element. Our stainless steel disc plates come in flat and dome profiles, in diameters from 16mm to 50mm, and in four finishes — silver, gold, black, and rose gold — to complement any interior style. They thread or snap over the screw head after installation, sitting flush against the glass or wall surface. The dome profile adds a subtle three-dimensional detail that works well with contemporary and industrial interiors.
Silicone Rubber End Caps for Chair Legs, Pipes & Tube Ends
Silicone rubber end caps serve double duty: they protect floors from scratches caused by metal or hard plastic furniture legs, and they seal the open ends of pipes, tubes, and hollow profiles against dust, moisture, and debris. Our white round silicone caps cover an exceptionally wide size range — 3mm to 157.5mm — making them suitable for everything from thin metal chair legs to large-diameter PVC pipe ends. The flexible silicone material grips firmly without adhesive, resists UV and moisture for outdoor use, and can be removed and reinstalled without losing elasticity.
Round Hole Plugs & Rubber Blanking Seals for Panels & Enclosures
Round hole plugs — also called blanking plugs or button plugs — are designed to fill and seal an open hole completely, sitting flush with the panel surface. They're commonly used to cover unused knockout holes in electrical enclosures, seal unused mounting points on equipment panels, and finish off drilled holes in furniture where no fastener is needed. Our rubber button screw caps and blanking seals are available in 9mm, 10mm, and 11mm diameters in black and white, providing a clean, flush finish that's nearly invisible once installed.
Multi-Size Plastic Screw Cap Assortments for Home Repair & Maintenance
If you're maintaining a home, managing a rental property, or running a small workshop, keeping a mixed assortment of screw caps on hand saves repeated trips to the hardware store. Our multi-size plastic push-fit cap sets cover the most common hole diameters in a single purchase, available in black, white, and brown. The 8mm to 18mm range handles the majority of furniture and cabinet applications, while the broader 5mm to 40mm assortment covers edge cases like larger shelf pin holes and oversized cam fittings. Having the right size ready when you need it is the kind of small efficiency that adds up over dozens of projects.
Maintenance Tips for Screw Caps & Hole Plugs
Run through this quick checklist each season to keep your furniture looking sharp and your caps doing their job:
- Check push-fit caps on high-traffic furniture (chairs, desks, drawers) for loosening — a cap that's worked free exposes the screw head and can snag clothing or skin. Press firmly back into place or replace if the plug tab is worn.
- Inspect silicone rubber leg caps for cracking or flattening, especially on chairs used daily. Flattened caps no longer cushion impact and can allow the metal leg to contact the floor directly.
- Wipe self-adhesive cam cover caps with a damp cloth to remove dust buildup — adhesive caps can lift at the edges over time in humid environments. Press edges back down or replace if the adhesive has failed.
- Check stainless steel mirror screw caps for loosening, particularly in bathrooms where steam and temperature changes can cause slight expansion and contraction. Tighten by hand or with a soft cloth to avoid scratching the finish.
- After any furniture move or reassembly, audit all cap positions — moving furniture often dislodges push-fit caps that were seated in the original location. Keep a small supply of spares in the same color for quick replacements.
- For outdoor furniture, inspect rubber and silicone caps at the start of each season for UV degradation. Replace any caps that have become brittle, discolored, or no longer grip the tube end securely.
Frequently Asked Questions — Screw Caps & Hole Cover Plugs
What are screw caps used for?
Screw caps are used to cover exposed screw heads, bolt ends, and drilled holes on furniture, cabinetry, walls, and fixtures. They protect the fastener from moisture and corrosion, prevent snagging on clothing or skin, and give the finished surface a clean, professional look. Common applications include flat-pack furniture assembly, mirror and glass mounting, chair leg protection, and cabinet door finishing.
What sizes of screw caps do I need for flat-pack furniture?
Most flat-pack furniture uses 5mm to 8mm cam lock holes and 13mm to 21mm decorative cover caps. Our plastic push-fit screw hole cover caps are available from 5mm to 40mm in diameter, and our self-adhesive 21mm cam cover caps are specifically sized for standard flat-pack cam fittings. Check your furniture's instruction manual for the exact hole diameter before ordering.
What is the difference between push-fit and self-adhesive screw caps?
Push-fit screw caps snap into a pre-drilled hole using a friction-fit plug — no adhesive required. They're easy to remove and reposition, making them ideal for furniture you may disassemble later. Self-adhesive caps stick directly over the screw head on a flat surface and are better for permanent installations where the hole is not recessed. Both types are available in our collection in multiple colors.
Can screw caps be used outdoors?
It depends on the material. Our silicone rubber end caps and round hole plugs are weather-resistant and suitable for outdoor use on chair legs, pipe ends, and garden furniture. Standard plastic push-fit caps are best for indoor use as prolonged UV exposure can cause brittleness. For outdoor mirror or glass mounting, our stainless steel mirror screw cover caps offer corrosion resistance in exposed environments.
How do I choose the right color for my screw caps?
Match the cap color to your furniture or surface finish. Our plastic push-fit caps come in black, white, and brown — the three most common furniture board colors. Our decorative mirror screw cover caps are available in silver, gold, black, and rose gold to complement metal fixtures and glass panels. Self-adhesive cam cover caps are available in white for light-colored flat-pack furniture.
What are mirror screw cover caps and how do I install them?
Mirror screw cover caps are decorative disc plates that thread or snap over the head of a screw used to mount mirrors, glass panels, or artwork to a wall. To install: drill the mounting hole, insert a wall anchor if needed, drive the screw leaving a small gap, then slide or thread the decorative cap over the screw head until it sits flush against the surface. Our stainless steel mirror caps come in flat and dome profiles in 16mm to 50mm diameters.
Are silicone rubber end caps reusable?
Yes. Silicone rubber end caps are flexible and durable, and can be removed and reinstalled multiple times without losing their grip. They're commonly used on chair and table legs to protect floors, and can be swapped between furniture pieces as needed. Our white round silicone rubber end caps are available in sizes from 3mm to 157.5mm to fit a wide range of tube and pipe diameters.
What is the difference between a round hole plug and a screw cap?
A round hole plug (also called a blanking plug or button plug) is designed to fill and seal an open hole completely — it sits flush with the surface and covers the entire opening. A screw cap, by contrast, is designed to cover a screw head that is already installed in the hole. Hole plugs are used when you want to hide an unused hole entirely; screw caps are used when the fastener needs to remain in place but look finished.
How many screw caps do I need for a typical furniture project?
A standard bookcase or wardrobe typically uses 20 to 40 cam lock fittings, each requiring one cover cap. A set of four dining chairs may need 16 to 32 leg end caps. Our caps are sold in packs of 100 or in assorted multi-size sets, so you'll have enough for a full room refresh with spares for future repairs. Check the product listing for exact pack quantities.
Does HomeDIYer offer free shipping on screw caps and hole plugs?
Yes. HomeDIYer offers free standard shipping on qualifying orders. Check the product page or your cart for the current free-shipping threshold and any active promotions. Expedited shipping options are available at checkout if you need your caps in a hurry.
