Brass Round Tube Pipe 300mm | OD 3–40mm | Wall 0.2–2mm | Seamless
Brass Round Tube Pipe 300mm | OD 3–40mm | Wall 0.2–2mm | Seamless
Brass Round Tube Pipe 300mm | OD 3–40mm | Wall 0.2–2mm | Seamless
Brass Round Tube Pipe 300mm | OD 3–40mm | Wall 0.2–2mm | Seamless
Brass Round Tube Pipe 300mm | OD 3–40mm | Wall 0.2–2mm | Seamless
Brass Round Tube Pipe 300mm | OD 3–40mm | Wall 0.2–2mm | Seamless
Brass Round Tube Pipe 300mm | OD 3–40mm | Wall 0.2–2mm | Seamless
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Brass Round Tube Pipe 300mm | OD 3–40mm | Wall 0.2–2mm | SeamlessBrass Round Tube Pipe 300mm | OD 3–40mm | Wall 0.2–2mm | SeamlessBrass Round Tube Pipe 300mm | OD 3–40mm | Wall 0.2–2mm | SeamlessBrass Round Tube Pipe 300mm | OD 3–40mm | Wall 0.2–2mm | SeamlessBrass Round Tube Pipe 300mm | OD 3–40mm | Wall 0.2–2mm | SeamlessBrass Round Tube Pipe 300mm | OD 3–40mm | Wall 0.2–2mm | SeamlessBrass Round Tube Pipe 300mm | OD 3–40mm | Wall 0.2–2mm | Seamless

Brass Round Tube Pipe 300mm | OD 3–40mm | Wall 0.2–2mm | Seamless

HomeDIYer
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By HomeDIYer®

Price:
$7.19 USD
Stock:
In stock (500 units), ready to be shipped

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Description

Seamless Brass Round Tube Pipe — Precision Sizing for DIY, Plumbing & Fabrication

Whether you're replacing a worn fitting, building a custom fluid line, or crafting a scale model, finding a seamless brass tube in exactly the right diameter and wall thickness can be frustrating. Undersized tubes leak; oversized ones won't fit your fittings. This listing solves that problem with a wide selection of outer diameters from 3mm (≈1/8") to 40mm (≈1-9/16") and wall thicknesses from 0.2mm to 2mm — all in a practical 300mm (≈11.8" / ~1 ft) length.

Each piece is a seamless brass round tube, sold individually. Outer diameters span 3mm (≈1/8") to 40mm (≈1-9/16"); inner diameters vary by wall thickness selection (0.2mm, 0.5mm, 1mm, 1.5mm, or 2mm). The 300mm length (30cm / 0.3m) is consistent across all size variants. Material is brass — an alloy of copper and zinc — with a smooth, bright finish.

Typical use cases include DIY plumbing repairs and custom tube fittings, hobby and scale model construction where precise brass tube sizing is critical, and light fabrication work such as spacers, standoffs, and decorative metalwork. The seamless construction makes these tubes well-suited for applications where a uniform wall and clean bore are important.

ℹ️ Compatibility Note: These are plain, unthreaded seamless tubes. Verify your required OD and ID against your fittings before ordering. Dimensions are metric — see the size selector for exact OD × wall thickness combinations.

✅ Key Features of These Seamless Brass Round Tubes

  • 🔩Wide Size Range — OD from 3mm (≈1/8") to 40mm (≈1-9/16") with wall options of 0.2mm, 0.5mm, 1mm, 1.5mm, and 2mm, covering most DIY brass tube sizing needs in a single listing.
  • 🛠️Seamless Construction — No weld seam means a uniform wall thickness throughout, reducing weak points and making these tubes suitable for light-pressure fluid and gas lines.
  • ⚙️Machinable Brass Alloy — Brass cuts, drills, and solders cleanly with standard tools, making it a go-to material for custom fabrication, model engineering, and hobby metalwork.
  • 🌿Natural Corrosion Resistance — Brass resists oxidation and performs reliably in moist or mildly corrosive environments, reducing maintenance needs in plumbing and HVAC applications.
  • 📏Consistent 300mm Length — Each tube is 300mm (30cm / ≈11.8") long — a practical cut length for most bench projects, easily trimmed shorter with a pipe cutter or hacksaw.
  • ✨Smooth Bore & Bright Finish — The clean inner bore supports good flow characteristics in fluid applications, while the bright brass exterior suits decorative and visible installations.

📐 Technical Specifications — Seamless Brass Round Tube

Material Brass (copper-zinc alloy)
Shape Round tube (seamless)
Length 300mm (30cm / ≈11.8" / ~1 ft)
Outer Diameter (OD) Range 3mm (≈1/8") – 40mm (≈1-9/16")
Wall Thickness Options 0.2mm / 0.5mm / 1mm / 1.5mm / 2mm
Inner Diameter (ID) See variant options (OD minus 2× wall thickness)
Finish Bright brass (natural)
Quantity per Order 1 piece
Country of Origin China
Thread / Fitting Unthreaded — compatible with standard compression or push-fit fittings (confirm OD match)
⚠️ Size Tip: Inner diameter = OD − (2 × wall thickness). Example: OD 10mm × 1mm wall = 8mm ID. Always confirm your fitting's bore requirement before selecting a variant.

❓ Frequently Asked Questions

How do I choose the right outer diameter and wall thickness?

Measure the bore (inner diameter) you need first, then add twice the wall thickness to get the outer diameter. For example, if you need a 10mm bore with a 1mm wall, select OD 12mm × 1mm. Wall thickness options are 0.2mm, 0.5mm, 1mm, 1.5mm, and 2mm — thicker walls generally provide greater rigidity and load capacity. In inches: 10mm ≈ 3/8", 25mm ≈ 1", 40mm ≈ 1-9/16".

What load or pressure can these brass tubes handle?

Brass tubing is generally rated for moderate pressure applications. Thicker-walled variants (1.5mm–2mm) typically handle higher mechanical loads and pressures than thin-walled (0.2mm–0.5mm) options. For critical pressure systems, please consult an engineer and confirm specifications with us before ordering.

Are these tubes suitable for outdoor or humid environments?

Brass has inherent corrosion resistance and performs well in moist or mildly corrosive environments — making it a common choice for plumbing, marine fittings, and outdoor decorative work. For prolonged outdoor exposure or contact with saltwater, a protective lacquer or sealant is generally recommended to maintain the bright finish.

What thread or fitting standards are compatible with these tubes?

These are plain seamless tubes without pre-cut threads. They are compatible with standard compression fittings, push-fit connectors, and can be threaded using standard BSP or NPT taps and dies. Always verify the OD matches your fitting's bore specification before purchasing.

Can I cut or machine these tubes to a custom length?

Yes. Brass machines and cuts cleanly with standard metalworking tools — a pipe cutter, hacksaw, or lathe all work well. Deburr cut ends with a file or deburring tool for a clean, safe finish. The 300mm length is a practical starting point for most bench-cut projects.

Which size should I choose for model-making or hobby projects?

For fine detail work and scale models, thinner-walled options (0.2mm–0.5mm wall) in smaller ODs (3mm–10mm) are typically preferred. They are lightweight, easy to solder, and hold shape well at small scales. Larger ODs with 1mm+ walls suit structural model frames and engineering prototypes.

Is the 300mm length the only option available?

Currently all listings ship at 300mm (≈11.8" / ~1 ft) per piece. If you need a different length, contact us — we may be able to accommodate custom cut requests depending on the size selected.

🛒 Select your size and wall thickness above, then add to cart — ships from our US warehouse.

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