Black Silicone Rubber Blanking End Cap Tube Pipe Insert Plug 6.8mm–201.5mm | HomeDIYer

Black Silicone Rubber Blanking End Caps Tube Pipe Inserts Plug Bung 6.8 - 201.5mm - HomeDIYer

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Black Silicone Rubber Blanking End Cap | Tube & Pipe Insert Plug Bung | 6.8mm–201.5mm | 59 Sizes

Name: Black Silicone Rubber Blanking End Cap | Tube & Pipe Insert Plug Bung | 6.8mm–201.5mm | 59 Sizes
Brand: HomeDIYer
Price: 2.34 USD
Availability: InStock

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Size: A=6.8mm

Price:

$2.34 USD

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In stock (500 units), ready to be shipped

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Black Silicone Rubber Blanking End Cap — Tube & Pipe Insert Plug Bung, 6.8mm–201.5mm, 59 Sizes

Open tube and pipe ends in fabricated frames, furniture, equipment, and enclosures collect dust, allow moisture ingress, create sharp edge hazards, and leave an unfinished appearance. This silicone rubber blanking end cap inserts into the open end of round tubes and pipes, providing a clean, secure, waterproof seal that protects the tube interior and finishes the exposed end.

Made from premium silicone rubber (Shore hardness 50), rated from -40°C to +250°C, and resistant to UV, acids, alkalis, aging, and corrosion. Available in 59 sizes from A=6.8mm to A=201.5mm (where A is the tube or pipe inner diameter the cap inserts into). Prices from $2.34 per cap. Black color — also available in white. Suitable for powder coating, painting, anodizing, plating, and media blasting masking.

Suited for blanking open tube ends in aluminum profile frames, steel tube furniture, equipment enclosures, pipe systems, automotive bodywork, and industrial machinery; also used as spray masking plugs during surface treatment processes.

✅Sizing note: The size listed (A) is the inner diameter of the tube or pipe the cap inserts into. Measure your tube or pipe inner diameter accurately and select the matching A size. For a snug, secure fit, the cap should require light hand pressure to insert — if it slides in freely, select the next size up.

✅ Key Features of This Silicone Rubber Blanking End Cap

🔘Tube & Pipe End Insert Design: The tapered body inserts into the open end of round tubes and pipes, with a flanged lip that seats flush against the tube end face — providing a clean, finished appearance and a secure, non-falling fit.
🧲Premium Silicone Rubber: Non-toxic, flexible silicone (Shore 50) resists cracking, shrinking, hardening, and breaking over time. Maintains flexibility and sealing performance across the full temperature range without becoming brittle.
🌡️Wide Temperature Range −40°C to +250°C: Suitable for outdoor aluminum profile frames, automotive tube ends, industrial equipment, and powder coating oven masking — retains flexibility and sealing performance at temperature extremes.
💧Waterproof & Dustproof Seal: The flanged cap seals the tube end against water, dust, and contaminants — protecting the tube interior from moisture ingress and debris accumulation in outdoor and industrial environments.
📏59 Sizes from 6.8mm to 201.5mm: Covers the most common round tube and pipe inner diameters from small 6.8mm aluminum profile tubes up to 201.5mm large-diameter pipe ends — in increments as small as 0.5mm for precise fit.
🔧Spray Masking & Surface Treatment: Silicone withstands powder coating oven temperatures up to 250°C and resists paint, anodizing, and plating chemicals — insert before surface treatment and remove cleanly after completion.

🎯 Who Is This For?

🛠️Aluminum Profile & Steel Tube Frames

Cap open tube ends on aluminum extrusion frames, steel tube furniture, shelving, and equipment stands — preventing dust and moisture ingress into the tube interior and providing a clean, finished end appearance.

🚗Automotive Tube & Bodywork

Seal open tube ends in automotive chassis, roll cages, and bodywork to prevent moisture ingress and corrosion inside the tube. Silicone withstands automotive fluids, UV, and temperature variation.

🏭Industrial Pipe & Equipment

Blank open pipe ends in industrial equipment, machinery frames, and enclosures during storage, transport, or installation — protecting pipe interiors from contamination and providing a safe, finished end.

🎨Powder Coating & Surface Treatment Masking

Insert into tube ends before powder coating, painting, anodizing, plating, or media blasting to protect the tube interior from surface treatment ingress. Remove cleanly after the process is complete.

Specification	Details
Material	Silicone rubber (non-toxic)
Color	Black (white also available)
Shore Hardness	50
Temperature Range	-40°C to +250°C
Size Range (A)	6.8mm to 201.5mm (59 sizes)
A Dimension	Tube/pipe inner diameter the cap inserts into
Dimensional System	Metric
Chemical Resistance	Acid, alkali, UV, ozone, aging, corrosion resistant
Application	Tube end blanking, pipe end sealing, spray masking, furniture, automotive, industrial
Installation	Press-fit insert; no tools or adhesive required. Removable and reusable.
Price Range	$2.34 (A=6.8mm) to $27.43 (A=201.5mm)

Size Reference (Selected Sizes)

❓ Frequently Asked Questions

How do I select the correct size?

The size (A) refers to the inner diameter of the tube or pipe the cap inserts into. Measure your tube or pipe inner diameter accurately using calipers. Select the size that matches your tube inner diameter. The cap should require light hand pressure to insert — if it slides in freely without resistance, select the next size up for a snug, secure fit.

Is this cap waterproof and suitable for outdoor use?

Yes — the silicone rubber material is waterproof, UV-resistant, and corrosion-resistant, making it suitable for outdoor aluminum profile frames, outdoor furniture, and outdoor equipment tube ends. The flanged cap seals the tube end against rain and moisture ingress.

Can this cap be used for powder coating and spray painting masking?

Yes — the silicone material is rated to +250°C and resists paint, powder coating, anodizing, and plating chemicals. Insert the cap into the tube end before the surface treatment process and remove after completion. Silicone does not bond to most coating materials and removes cleanly.

Can the cap be removed and reused?

Yes — the press-fit design is removable. Pull the cap out from the flange side. Silicone retains its flexibility and shape after removal, so the cap can typically be reused multiple times provided it has not been damaged or permanently deformed.

Is this cap available in white or other colors?

Yes — a white version is available. If you need white, please check the white variant listing. All colors use the same silicone rubber material and are available in the same size range.

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

59 sizes are available from A=6.8mm to A=201.5mm — select your size from the dropdown above. If you need a custom size or a bulk quantity order, please contact our customer service team with your requirements.

🛒 Select your size (A = tube inner diameter) above, then add to cart.

Black Silicone Rubber Blanking End Cap | Tube & Pipe Insert Plug Bung | 6.8mm–201.5mm | 59 Sizes

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Description

Black Silicone Rubber Blanking End Cap — Tube & Pipe Insert Plug Bung, 6.8mm–201.5mm, 59 Sizes

✅ Key Features of This Silicone Rubber Blanking End Cap

🎯 Who Is This For?

Size Reference (Selected Sizes)

❓ Frequently Asked Questions

Black Silicone Rubber Blanking End Cap | Tube & Pipe Insert Plug Bung | 6.8mm–201.5mm | 59 Sizes

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