Brass Round Tube 300mm — OD 10–18mm, 3mm Wall Thickness
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Brass Round Tube 300mm — OD 10–18mm, 3mm Wall Thickness

Brass Round Tube 300mm — OD 10–18mm, 3mm Wall Thickness

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Price:
$18.54 USD
Stock:
In stock (500 units), ready to be shipped

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Description

Brass Round Tube 300mm — Precision Sizing for Machining, Fabrication & DIY Builds

Whether you're building a custom bushing, fabricating a fluid line, or crafting a precision spacer, finding a brass round tube with the right outer diameter and wall thickness in a ready-to-use length is often harder than it should be. This listing is designed for makers, machinists, hobbyists, and tradespeople who need a reliable, machinable brass tube without ordering custom stock.

Each piece is a solid-wall brass round tube, 300mm (≈11.8") long, with a consistent 3mm wall thickness. Outer diameters are available in six sizes: 10mm (≈3/8"), 12mm (≈15/32"), 14mm (≈35/64"), 15mm (≈19/32"), 16mm (≈5/8"), and 18mm (≈45/64"). Inner diameters are calculated as OD minus 6mm — for example, the 16mm OD tube has an inner diameter of approximately 10mm. Material is brass alloy, offering a balance of machinability, corrosion resistance, and conductivity.

Typical use cases include replacement bushings and sleeve bearings in light machinery, standoffs and spacers in electronics enclosures, decorative metalwork and jewelry fabrication, fluid and pneumatic line fittings in workshop equipment, and model engineering projects requiring metric brass tube stock.

🔵 Compatibility Note: These are plain, unthreaded metric brass tubes. Verify your fitting's required OD and ID before ordering. Inner diameter = Outer Diameter − 6mm (3mm wall × 2). Not pre-cut to custom lengths — each piece ships at 300mm.

✅ Key Features of These Brass Round Tubes

  • 🔩Thick 3mm Wall Construction — A 3mm wall gives each tube meaningful rigidity and load-bearing capacity, making it suitable for bushings, sleeve bearings, and structural spacers where thin-wall tubing would deform under press-fit or clamping force.
  • 📏Six Metric OD Options in One Listing — Choose from 10mm, 12mm, 14mm, 15mm, 16mm, or 18mm outer diameter — all at a consistent 300mm (≈11.8") length — so you can match the exact metric brass tube size your project calls for without buying bulk stock.
  • ⚙️Free-Machining Brass Alloy — Brass machines cleanly on a lathe or mill with minimal tool wear, holds tight tolerances, and produces smooth surface finishes. It can be drilled, tapped, knurled, or parted off without the galling issues common with stainless steel.
  • 🔥Solderable & Brazeable — Bonds readily with silver solder, lead-free solder, and brazing rods using standard flux. Ideal for plumbing repairs, model boiler construction, and any application where a leak-free metal joint is required.
  • 🌧️Naturally Corrosion-Resistant — Brass resists oxidation and performs reliably in humid, wet, and mildly corrosive environments. A good choice for outdoor fixtures, marine hardware accents, and workshop fluid lines where mild steel would rust.
  • ✂️Easy to Cut & Finish — Cuts cleanly with a standard pipe cutter or hacksaw. The 300mm length gives you enough material to cut down to your required dimension with room for squaring the ends. Deburrs quickly with a round file or deburring tool.

📐 Technical Specifications — Brass Round Tube

Material Brass alloy (free-machining grade)
Length 300mm (≈11.8")
Wall Thickness 3mm
Available Outer Diameters 10mm (≈3/8"), 12mm (≈15/32"), 14mm (≈35/64"), 15mm (≈19/32"), 16mm (≈5/8"), 18mm (≈45/64")
Inner Diameter (by OD) OD 10mm → ID 4mm | OD 12mm → ID 6mm | OD 14mm → ID 8mm | OD 15mm → ID 9mm | OD 16mm → ID 10mm | OD 18mm → ID 12mm
Tube Profile Round, plain (unthreaded)
Finish Mill finish (natural brass)
Quantity per Order 1 piece per variant selected
Machinability Suitable for lathe, mill, drill press operations
Solderability Compatible with silver solder, lead-free solder, brazing rod
Country of Origin China
Ships From US warehouse

❓ Frequently Asked Questions

How do I choose the right outer diameter for my project?

Measure the bore or socket you need to fit into, then select an OD that matches or is slightly smaller. For sliding fits, the OD should generally be 0.1–0.3mm smaller than the receiving hole. For press fits, the OD is typically 0.01–0.05mm larger. Available sizes in this listing range from 10mm (≈3/8") to 18mm (≈45/64").

What is the inner diameter of each tube size?

Because all variants share a 3mm wall thickness, the inner diameter equals the outer diameter minus 6mm (3mm wall × 2 sides). For example: OD 10mm → ID 4mm | OD 12mm → ID 6mm | OD 14mm → ID 8mm | OD 15mm → ID 9mm | OD 16mm → ID 10mm | OD 18mm → ID 12mm.

How strong is this brass tube — can it handle structural loads?

Brass alloy generally has a tensile strength of around 340–470 MPa depending on the specific grade. With a 3mm wall, these tubes are typically suitable for light-to-medium structural applications such as bushings, spacers, and support sleeves. For heavy load-bearing or safety-critical applications, consult a mechanical engineer to verify suitability.

Is this brass tube suitable for outdoor or marine environments?

Brass is naturally corrosion-resistant and generally performs well in outdoor and humid environments. It is not recommended for prolonged submersion in high-chloride (saltwater) environments without additional protective coating, as dezincification can occur over time. For mild marine exposure — such as deck hardware or outdoor fixtures — brass is typically a reliable choice.

Can I solder or braze this tube to other metal parts?

Yes. Brass is one of the most solderable and brazeable metals available. It bonds readily with standard silver solder, lead-free solder, and brazing rods using common flux. Clean the surface with fine abrasive paper or apply flux before joining for best adhesion. This makes it a popular choice for model boiler construction, plumbing repairs, and decorative metalwork.

What thread or fitting standards are compatible with this tube?

This is a plain, unthreaded tube. It is compatible with metric compression fittings, push-fit connectors, and sleeve couplings sized to match the OD you select. For threaded connections, the tube can be tapped internally or fitted with compression nuts. Always verify fitting compatibility with your specific connector brand and confirm the ID clearance before ordering.

Can I cut this tube to a shorter length?

Yes. Brass cuts cleanly with a pipe cutter, hacksaw, or milling machine. A pipe cutter generally gives the cleanest, squarest cut with minimal burring. After cutting, deburr the end with a round file or deburring tool before use to avoid sharp edges and ensure a clean fit.

🛒 Select your outer diameter above, then add to cart — ships from our US warehouse.

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