Black Hole Plug End Cap Round Solid Silicone Rubber Blanking Seal Bung 3mm - 15mm - HomeDIYer
Black Hole Plug End Cap Round Solid Silicone Rubber Blanking Seal Bung 3mm - 15mm - HomeDIYer
Black Hole Plug End Cap Round Solid Silicone Rubber Blanking Seal Bung 3mm - 15mm - HomeDIYer
Black Hole Plug End Cap Round Solid Silicone Rubber Blanking Seal Bung 3mm - 15mm - HomeDIYer
Black Hole Plug End Cap Round Solid Silicone Rubber Blanking Seal Bung 3mm - 15mm - HomeDIYer
Black Hole Plug End Cap Round Solid Silicone Rubber Blanking Seal Bung 3mm - 15mm - HomeDIYer
Black Hole Plug End Cap Round Solid Silicone Rubber Blanking Seal Bung 3mm - 15mm - HomeDIYer
Black Hole Plug End Cap Round Solid Silicone Rubber Blanking Seal Bung 3mm - 15mm - HomeDIYer
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Black Hole Plug End Cap Round Solid Silicone Rubber Blanking Seal Bung 3mm - 15mm - HomeDIYerBlack Hole Plug End Cap Round Solid Silicone Rubber Blanking Seal Bung 3mm - 15mm - HomeDIYerBlack Hole Plug End Cap Round Solid Silicone Rubber Blanking Seal Bung 3mm - 15mm - HomeDIYerBlack Hole Plug End Cap Round Solid Silicone Rubber Blanking Seal Bung 3mm - 15mm - HomeDIYerBlack Hole Plug End Cap Round Solid Silicone Rubber Blanking Seal Bung 3mm - 15mm - HomeDIYerBlack Hole Plug End Cap Round Solid Silicone Rubber Blanking Seal Bung 3mm - 15mm - HomeDIYerBlack Hole Plug End Cap Round Solid Silicone Rubber Blanking Seal Bung 3mm - 15mm - HomeDIYerBlack Hole Plug End Cap Round Solid Silicone Rubber Blanking Seal Bung 3mm - 15mm - HomeDIYer

Black Solid Silicone Hole Plug | Round End Cap Blanking Bung | 2.7mm–15mm | 32 Sizes

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By HomeDIYer®

Price:
$2.19 USD
Stock:
In stock (500 units), ready to be shipped

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Description

Black Solid Silicone Hole Plug — Round End Cap Blanking Bung, 2.7mm–15mm, 32 Sizes

Small holes in panels, enclosures, pipes, and equipment that are left open collect dust, allow moisture and gas ingress, and leave an unfinished appearance. This black solid silicone rubber hole plug provides a clean, secure, fully sealed blanking solution for round holes from 2.7mm to 15mm in diameter — pressing in from one side and seating firmly without adhesive, fasteners, or tools.

Unlike T-type flanged plugs, this is a solid round end cap design — the plug body fills the hole completely with no through-passage, providing a fully solid seal. Made from high-quality silicone rubber, rated to +250°C, and resistant to acids, corrosion, and high-temperature environments. Available in 32 sizes from A=2.7mm to A=15mm. Prices from $2.19 per plug.

Suited for sealing small holes in electrical enclosures, control panels, aluminum panels, PVC and steel pipes, laboratory equipment, and industrial machinery; also used as spray masking plugs and test tube plugs.

✅Sizing note: The size listed (A) is the plug diameter — select the size that matches your hole diameter for a snug press-fit. If the plug slides in freely, select the next size up. For a compression seal, you may select one size larger than the hole for a tighter interference fit.

✅ Key Features of This Solid Silicone Hole Plug

  • 🔵Solid Round End Cap Design: Unlike T-type flanged plugs, this solid round plug fills the hole completely with no through-passage — providing a fully solid, flush-fitting seal that is discreet and low-profile once installed.
  • 🧲High-Quality Silicone Rubber: Flexible, durable silicone rubber resists cracking, shrinking, and hardening over time. Maintains its sealing performance and shape across a wide temperature range without becoming brittle.
  • 🌡️High Temperature Resistance to +250°C: Suitable for use in high-temperature environments including industrial equipment, automotive applications, and powder coating oven masking — retains flexibility and sealing performance at elevated temperatures.
  • 💧Waterproof, Dustproof & Corrosion-Resistant Seal: Effectively prevents liquid, gas, dust, and water vapor from entering pipes or equipment through the sealed hole. Resistant to acids and special media — suitable for chemical and laboratory environments.
  • 📏32 Sizes from 2.7mm to 15mm: Fine-grained size range in 0.3mm–0.5mm increments for small sizes, covering the most common small-hole blanking requirements in panels, pipes, and equipment enclosures.
  • 🔧Adjustable Fit: The flexible silicone material allows the plug to be adjusted with tools for a tighter interference fit if needed — increasing firmness and retention in applications where vibration or pressure may dislodge a standard press-fit plug.

🎯 Who Is This For?

⚡Electrical Enclosures & Control Panels

Seal small unused holes in electrical enclosures, junction boxes, and control panels to maintain IP dust and moisture ratings. The solid design provides a fully sealed blank with no through-passage — more secure than open-centre grommets for unused holes.

🧪Laboratory & Chemical Equipment

Plug test tube openings, pipe ends, and equipment holes in laboratory and chemical environments. Silicone is resistant to acids and a wide range of chemical media — suitable for use in special media applications.

🚗Automotive & Spray Painting Masking

Use as spray masking plugs during painting, powder coating, anodizing, and plating to protect small threaded holes and bores from surface treatment ingress. Silicone withstands oven curing temperatures up to 250°C.

🏭Industrial Machinery & Equipment

Seal small holes in industrial machinery panels, equipment enclosures, and pipe systems to prevent dust, moisture, and contaminant ingress during operation and storage.

Specification Details
Material Silicone rubber
Design Solid round end cap (no through-passage)
Color Black
Dimensional System Metric
Temperature Resistance Up to +250°C
Size Range (A) 2.7mm, 3mm, 3.3mm, 3.8mm, 4mm, 4.3mm, 4.5mm, 4.8mm, 5mm, 5.3mm, 5.5mm, 5.8mm, 6mm, 6.3mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 15mm
Chemical Resistance Acid-resistant; suitable for special media
Sealing Waterproof, dustproof, gas-tight, corrosion-resistant
Installation Press-fit; adjustable with tools for tighter fit. No adhesive required.
Price Range $2.19 (A=3mm) to $2.46 (A=15mm)

❓ Frequently Asked Questions

What is the difference between this solid plug and a T-type flanged plug?

This is a solid round end cap — the plug body fills the hole completely with no through-passage. It sits flush or slightly recessed in the hole with no visible flange on the surface. A T-type flanged plug has a visible flanged cap that sits on the surface around the hole. Choose this solid plug when you need a low-profile, flush-fitting seal with no surface protrusion. Choose a T-type plug when you need a visible flange to prevent the plug from passing through the hole.

How do I select the correct size?

The size (A) is the plug diameter. Measure your hole diameter accurately using calipers. Select the size that matches your hole diameter for a standard press-fit. For a tighter compression seal, select one size larger than the hole — the flexible silicone will compress to fill the hole and provide a more secure, vibration-resistant fit.

Is this plug suitable for high-temperature environments?

Yes — the silicone material is rated to +250°C, making it suitable for industrial equipment, automotive engine bay applications, and use as a masking plug during powder coating and paint oven curing cycles.

Is this plug resistant to acids and chemicals?

Yes — silicone rubber has good resistance to acids and a wide range of chemical media, making this plug suitable for laboratory equipment, chemical processing pipes, and industrial applications involving special media. For highly aggressive chemicals (e.g., strong oxidizing acids), verify compatibility before use.

Can the plug be removed and reused?

Yes — the press-fit design is removable. Use a pointed tool or thin flathead screwdriver to lever the plug out from the hole edge. Silicone retains its flexibility and shape after removal and can typically be reused multiple times.

What if I need a size not listed, or a bulk quantity?

32 sizes are available from A=2.7mm to A=15mm — select your size from the dropdown above. If you need a size outside this range or a bulk quantity order, please contact our customer service team with your requirements.

🛒 Select your size above, then add to cart.

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