Seamless Brass Round Tube — Inner Dia 2mm to 5mm, Multiple Lengths
Seamless Brass Round Tube — Inner Dia 2mm to 5mm, Multiple Lengths
Seamless Brass Round Tube — Inner Dia 2mm to 5mm, Multiple Lengths
Seamless Brass Round Tube — Inner Dia 2mm to 5mm, Multiple Lengths
Seamless Brass Round Tube — Inner Dia 2mm to 5mm, Multiple Lengths
Seamless Brass Round Tube — Inner Dia 2mm to 5mm, Multiple Lengths
Seamless Brass Round Tube — Inner Dia 2mm to 5mm, Multiple Lengths
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Seamless Brass Round Tube — Inner Dia 2mm to 5mm, Multiple LengthsSeamless Brass Round Tube — Inner Dia 2mm to 5mm, Multiple LengthsSeamless Brass Round Tube — Inner Dia 2mm to 5mm, Multiple LengthsSeamless Brass Round Tube — Inner Dia 2mm to 5mm, Multiple LengthsSeamless Brass Round Tube — Inner Dia 2mm to 5mm, Multiple LengthsSeamless Brass Round Tube — Inner Dia 2mm to 5mm, Multiple LengthsSeamless Brass Round Tube — Inner Dia 2mm to 5mm, Multiple Lengths

Seamless Brass Round Tube — Inner Dia 2mm to 5mm, Multiple Lengths

HomeDIYer
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By HomeDIYer®

Price:
$2.71 USD
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In stock (500 units), ready to be shipped

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Description

Seamless Brass Round Tube — Precise Dimensions for DIY, Modeling & Engineering

When a project demands tight tolerances and a clean finish, generic tubing just doesn't cut it. Hobbyists, model makers, and bench engineers who work with small-scale assemblies know the frustration of tubes that are out-of-round, have visible weld seams, or simply don't fit the mating part. These seamless brass round tubes are drawn to consistent metric dimensions so you get a reliable fit every time.

Each pack contains 10 or 20 pieces of seamless brass tube. Available inner-diameter-to-outer-diameter combinations are 2×3mm, 3×4mm, 4×5mm, and 5×6mm — all with a uniform 0.5mm wall thickness. Lengths run from 3mm (≈1/8") to 20mm (≈13/16") in 1mm increments, giving you fine-grained control over your build. The brass alloy provides a warm golden appearance and machines cleanly without burring.

Typical applications include precision spacers and standoffs in RC models and drones, bushings for small shafts in clock or instrument repair, decorative inlays and accent tubes in woodworking and jewelry, and short sleeve bearings in light-duty mechanical assemblies. The small OD range makes these seamless brass tubes for model making an especially popular choice among scale builders and hobbyists.

ℹ️ Compatibility note: Inner diameters are sized for metric shafts and bolts — 2mm ID fits M2, 3mm ID fits M3, 4mm ID fits M4, and 5mm ID fits M5 fasteners. Always verify your mating part tolerance before ordering.

✅ Key Features of These Seamless Brass Round Tubes

  • 🔩Seamless Construction — Drawn without a weld seam for uniform wall thickness and consistent roundness, reducing the risk of splitting under light press-fit loads.
  • 📏1mm Length Increments — Available from 3mm to 20mm in single-millimeter steps, so you can match the exact stack height needed for small brass tube spacers and standoffs.
  • ⚙️Four ID/OD Combinations — 2×3mm, 3×4mm, 4×5mm, and 5×6mm cover the most common metric shaft sizes used in hobby electronics, clockwork, and instrument repair.
  • ✂️Easy to Machine and Cut — Brass cuts cleanly with a pipe cutter, hacksaw, or lathe without the galling or work-hardening common in stainless steel, making custom-length trimming straightforward.
  • 🌡️Corrosion-Resistant Alloy — Brass performs well in indoor and mildly humid environments, making these short brass sleeve tubes suitable for instrument housings, decorative hardware, and light outdoor fixtures with a sealant.
  • 📦Flexible Pack Sizes — Choose 10-piece packs for one-off projects or 20-piece packs for batch builds, keeping your parts bin stocked without over-ordering.

📐 Technical Specifications — Seamless Brass Round Tube

Material Brass (copper-zinc alloy)
Construction Seamless drawn tube
Inner Diameter Options 2mm, 3mm, 4mm, 5mm
Outer Diameter Options 3mm, 4mm, 5mm, 6mm
Wall Thickness 0.5mm (uniform across all sizes)
Length Range 3mm (≈1/8") to 20mm (≈13/16") in 1mm increments
Pack Quantity 10 pcs or 20 pcs (select above)
Finish Natural brass (uncoated)
Measurement System Metric
Typical Use Spacers, standoffs, bushings, sleeve bearings, decorative inlays
Machinability Cuts and drills easily with standard tools
Corrosion Resistance Good for indoor and mildly humid environments
⚠️ Spec confirmation: If your application requires certified alloy grade, hardness rating, or tight dimensional tolerances beyond ±0.1mm, please contact us to confirm before ordering.

❓ Frequently Asked Questions

How do I choose the right length for my brass tube?

Measure the depth of the hole or the gap you need to fill, then select the closest length from our 3mm–20mm range. For reference, 10mm is approximately 3/8" and 20mm is approximately 13/16". When in doubt, size up — it is easier to trim a tube than to extend one.

What wall thickness do these brass tubes have?

Wall thickness is determined by the difference between inner and outer diameters. For all four size options in this listing, the wall is consistently 0.5mm. This is typical for small-diameter precision brass tubing used in model making and instrument work.

Can these brass tubes be used outdoors?

Brass is generally more corrosion-resistant than plain steel in mild outdoor environments. However, in coastal or highly humid conditions, brass can develop a patina over time. For prolonged outdoor exposure, applying a clear lacquer or sealant is typically recommended to preserve the finish.

What load or pressure can these tubes handle?

Brass typically has a tensile strength in the range of 300–500 MPa depending on alloy grade. These tubes are well-suited for light structural, decorative, and precision-fit applications such as spacers, bushings, and sleeve bearings. For heavy load-bearing or pressure applications, please contact us to confirm suitability.

Are these tubes compatible with standard metric fittings and bearings?

Yes. The outer diameters (3mm, 4mm, 5mm, 6mm) are machined to metric dimensions and are generally compatible with standard metric bushings, bearings, and fittings. The inner diameters are sized to pass M2–M5 bolts or shafts. Always verify the tolerance of your mating part before final assembly.

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

Yes. Brass machines and cuts easily with standard tools such as a pipe cutter, hacksaw, or lathe. The seamless construction means there are no weld seams that could cause uneven cuts or weak points. A fine-tooth blade or sharp pipe cutter will give the cleanest edge.

Which size should I choose for use as a spacer or standoff?

Match the inner diameter to the bolt or shaft passing through it, and choose a length equal to the gap you need to maintain. For example, an M2 bolt typically fits through the 2×3mm tube, and an M3 bolt through the 3×4mm tube. Select the 10-piece pack for prototyping or the 20-piece pack for batch production runs.

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

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