Blue Silicone Rubber Hole Plug Blanking End Cap Tube Insert 13mm–48.5mm | HomeDIYer
Silicone Rubber Round Hole Plugs Blanking End Cap Tube Pipe Insert Bung Blue - HomeDIYer
Silicone Rubber Round Hole Plugs Blanking End Cap Tube Pipe Insert Bung Blue - HomeDIYer
Silicone Rubber Round Hole Plugs Blanking End Cap Tube Pipe Insert Bung Blue - HomeDIYer
Silicone Rubber Round Hole Plugs Blanking End Cap Tube Pipe Insert Bung Blue - HomeDIYer
Silicone Rubber Round Hole Plugs Blanking End Cap Tube Pipe Insert Bung Blue - HomeDIYer
Silicone Rubber Round Hole Plugs Blanking End Cap Tube Pipe Insert Bung Blue - HomeDIYer
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Blue Silicone Rubber Hole Plug Blanking End Cap Tube Insert 13mm–48.5mm | HomeDIYerSilicone Rubber Round Hole Plugs Blanking End Cap Tube Pipe Insert Bung Blue - HomeDIYerSilicone Rubber Round Hole Plugs Blanking End Cap Tube Pipe Insert Bung Blue - HomeDIYerSilicone Rubber Round Hole Plugs Blanking End Cap Tube Pipe Insert Bung Blue - HomeDIYerSilicone Rubber Round Hole Plugs Blanking End Cap Tube Pipe Insert Bung Blue - HomeDIYerSilicone Rubber Round Hole Plugs Blanking End Cap Tube Pipe Insert Bung Blue - HomeDIYerSilicone Rubber Round Hole Plugs Blanking End Cap Tube Pipe Insert Bung Blue - HomeDIYer

Blue Silicone Rubber Hole Plug | Blanking End Cap & Tube Insert Bung | 13mm–48.5mm | 32 Sizes

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By HomeDIYer®

Diameter: A=13mm（Solid）
Price:
$2.50 USD
Stock:
In stock (500 units), ready to be shipped

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Description

Blue Silicone Rubber Hole Plug — Blanking End Cap & Tube Insert Bung, 13mm–48.5mm, 32 Sizes

Unused holes in metal panels, enclosures, automotive bodywork, and tube ends that are left open collect dust, allow moisture ingress, and leave an unfinished appearance. This blue silicone rubber hole plug provides a clean, secure, waterproof blanking solution for round holes and tube ends from 13mm to 48.5mm in diameter — pressing in by hand without adhesive, fasteners, or tools.

Made from high-quality silicone rubber with a tapered body design that accommodates slight variations in hole diameter and provides a firm, vibration-resistant fit. Available in 32 sizes from A=13mm to A=48.5mm — including three solid-body variants (13mm, 13.5mm, 14.1mm) and 29 T-type or end cap variants from 15mm to 48.5mm. Prices from $2.50 per plug. Blue color — visually distinctive for identification, inspection, and temporary masking applications.

Suited for blanking unused holes in metal panels, electrical enclosures, automotive bodywork, marine equipment, tube end sealing, and spray painting / powder coating masking.

✅Sizing note: The size listed (A) is the plug insertion diameter — select the size that matches your hole or tube inner diameter. The tapered body design accommodates minor dimensional variation. For a tighter compression fit, select one size up from your measured hole diameter.

✅ Key Features of This Blue Silicone Hole Plug

  • 🔵Blue Color for Visual Identification: The distinctive blue color makes these plugs easy to identify during installation, inspection, and removal — particularly useful in automotive, marine, and industrial masking applications where plugs must be located and removed after surface treatment.
  • 🧲High-Quality Silicone Rubber: Flexible, durable silicone rubber resists cracking, shrinking, and hardening over time. Maintains sealing performance and shape across a wide temperature range without becoming brittle.
  • 🔧Tapered Body Design: The tapered profile accommodates slight variations in hole diameter and provides a firm, self-centering fit — reducing the risk of the plug loosening under vibration or pressure during use or surface treatment processes.
  • 💧Waterproof & Dustproof Seal: Effectively seals holes against water, dust, and contaminant ingress — suitable for outdoor panels, automotive bodywork, marine equipment, and IP-rated enclosure blanking.
  • 🌡️High Temperature Resistance: Silicone rubber maintains flexibility and sealing performance at elevated temperatures — suitable for powder coating oven masking, automotive engine bay applications, and industrial high-temperature environments.
  • 📏32 Sizes from 13mm to 48.5mm: Covers a wide range of medium-to-large hole blanking requirements — from 13mm panel holes up to 48.5mm large-diameter tube ends, in increments as small as 0.5mm for precise fit.

🎯 Who Is This For?

🚗Automotive & Spray Painting Masking

The blue color makes these plugs easy to spot and remove after powder coating, painting, anodizing, and plating processes. Insert before surface treatment to protect holes and bores from paint and coating ingress — remove cleanly after the process is complete.

⚡Electrical Enclosures & Metal Panels

Blank unused holes in electrical enclosures, junction boxes, and metal control panels to maintain IP dust and moisture ratings. The blue color aids identification during panel assembly and inspection.

⚓Marine & Outdoor Equipment

Seal holes in marine equipment, outdoor enclosures, and weatherproof installations — silicone resists UV, saltwater, and moisture without degrading. Blue color is highly visible for maintenance inspection.

🛠️Tube End Sealing & Industrial Applications

Cap open tube ends and blank unused holes in industrial machinery, equipment frames, and fabricated structures — protecting tube interiors and panel holes from contamination during storage, transport, and operation.

Size (A) Type Price
13mm Solid $2.50
13.5mm Solid $2.54
14.1mm Solid $2.55
15mm – 19.5mm End cap / T-type $2.57 – $2.72
20mm – 29mm End cap / T-type $2.75 – $3.08
30.3mm – 39.3mm End cap / T-type $3.22 – $3.66
41.3mm – 48.5mm End cap / T-type $3.66 – $3.88
Specification Details
Material Silicone rubber
Color Blue
Size Range (A) 13mm to 48.5mm (32 sizes)
Body Design Tapered; solid (13–14.1mm) or end cap / T-type (15–48.5mm)
Chemical Resistance UV, moisture, corrosion resistant
Application Panel blanking, tube end sealing, automotive masking, marine, industrial
Installation Hand press-fit; no tools or adhesive required. Removable and reusable.

❓ Frequently Asked Questions

Why choose blue over black or other colors?

Blue plugs are the preferred choice when visual identification is important — for example, during automotive spray painting or powder coating masking, where all plugs must be located and removed after the process. The distinctive blue color stands out against most panel and enclosure colors, making it easy to confirm all plugs have been removed before the part goes into service. Blue is also commonly used in food processing and pharmaceutical environments where foreign object detection is required.

How do I select the correct size?

The size (A) is the plug insertion diameter. Measure your hole or tube inner diameter accurately using calipers. Select the size that matches your measurement. The tapered body design accommodates minor dimensional variation. For a tighter compression fit with more vibration resistance, select one size up from your measured hole diameter.

Is this plug suitable for powder coating and spray painting masking?

Yes — silicone rubber withstands the high temperatures of powder coating oven curing cycles and resists paint, anodizing, and plating chemicals. Insert the plug before the surface treatment process and remove after completion. The blue color makes it easy to confirm all plugs have been removed before the part goes into service.

Is this plug waterproof and suitable for outdoor or marine use?

Yes — silicone rubber is waterproof, UV-resistant, and resistant to saltwater and moisture, making it suitable for outdoor panels, marine equipment, and weatherproof enclosures.

Can the plug be removed and reused?

Yes — the press-fit design is removable. Pull or lever the plug out from the flange or body edge. Silicone retains its flexibility and shape after removal and can typically be reused multiple times provided it has not been damaged.

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

32 sizes are available from A=13mm to A=48.5mm — 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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