When choosing 120 wall tubing, the key is matching wall thickness, material, and OD to your project needs. This guide highlights five solid options across steel, stainless, and aluminum to help builders find the right fit. Ideal buyers include hobbyists building light frames, fabricators drafting small machinery, and DIY enthusiasts assembling racks or supports. Each product is evaluated for best-use cases, with practical trade-offs clearly explained.
| Product | Material | OD × Wall | Length | Best For |
|---|---|---|---|---|
| Small Parts Unpolished Round Tube (1.25″ OD, 0.120″ wall) | Steel | 1.250″ × 0.120″ | 4 ft | Small frames, light-duty structures |
| Small Parts Unpolished Round Tube (1.5″ OD, 0.120″ wall) | Steel | 1.5″ × 0.120″ | 4 ft | Medium-duty frames, supports |
| Allstar DOM Steel Tubing 1-3/4″ OD × 0.120″ wall | Steel | 1-3/4″ × 0.120″ | 4 ft | Automotive or structural frames |
| OnlineMetals A500/A513 Square Tubing 1.5″ × 1.5″ × 0.12″ | Carbon Steel | 1.5″ × 1.5″ × 0.12″ | 36″ | Rigid square frames, racking |
| Gisafai Aluminum Square Tubing 1″ × 1″ × 0.12″ (2 × 24″ pieces) | Aluminum 6061 | 1″ × 1″ × 0.12″ | 24″ per piece | Lightweight framing, display stands |
Small Parts Unpolished Round Tube 1.25″ OD, 0.120″ Wall
Material: Steel. Length: 4 ft. OD × wall: 1.250″ × 0.120″. Inner diameter around 1.010″. Best for compact fabrications where a moderate wall thickness is needed to resist bending. Caution: Measurements are nominal; outer diameter tolerances may affect precise fits in tight assemblies. Selected for small frames and light-duty supports where weight and strength balance matters.
Small Parts Unpolished Round Tube 1.5″ OD, 0.120″ Wall
Material: Steel. Length: 4 ft. OD × wall: 1.5″ × 0.120″. Inner diameter around 1.260″. Best for mid-size frames or supports with a bit more rigidity. Caution: Heavier than the 1.25″ option, which may require stronger fittings or tools. This size balances strength and weight for slightly larger DIY projects.
Allstar Round DOM Steel Tubing 1-3/4in × 0.120in × 4ft
Material: Steel. Length: 4 ft. OD × wall: 1-3/4″ × 0.120″. Best for automotive-style frames or light structural members with a need for stronger DOM steel. Caution: Larger outside diameter may limit fit in smaller assemblies. Selected as a robust option for medium-duty frames and roll cages where DOM steel is valued for straightness and formability.
OnlineMetals A500/A513 Carbon Steel Square Tubing 1.5″ × 1.5″ × 0.12″
Material: Carbon steel (A500/A513, hot rolled). Dimensions: 1.5″ × 1.5″, 0.12″ wall, 36″ length. Best for rigid frames, racks, and fixtures that require square profiles with predictable machining. Caution: Hot-rolled surface can require deburring or finishing prior to use in precision assemblies. This option is well-suited for shop fabrication and fixture-building where square geometry is essential.
Gisafai Aluminum Square Tubing 1″ × 1″ × 0.12″ (2 × 24″ Pieces)
Material: Aluminum 6061. Size: 1″ × 1″, 0.12″ wall, 24″ length per piece. Best for lightweight frames, display stands, or DIY projects where corrosion resistance and easy machining matter. Caution: Aluminum is less rigid than steel in the same dimensions; consider bracing for heavy loads. This option is ideal when weight savings are a priority.
UTVDistribution Heavy Duty Tube Connector Bung for 1-3/4″ OD Tubes
Material: 1018 steel. Fits 1-3/4″ OD tubing with .095″ or .120″ wall. Best for universal connections in fabrication projects and roll cages. Caution: Requires accurate tube ID measurements for proper fit. Chosen for its compatibility across tubing walls and simple integration into welded assemblies.
Buying Guide
What material should I choose?
Steel tubing provides higher strength for its diameter and tends to be more rigid for frames and supports. Aluminum offers weight savings and corrosion resistance, suitable for displays or portable structures. Stainless options exist but were not in the primary list; stainless is best for moisture-prone environments.
How do I match OD and wall thickness?
For load-bearing or rigid frames, a thicker wall increases stiffness. For light-duty projects, a thinner wall reduces weight and cost. Always verify the inner diameter and fit with connectors or sleeves to ensure proper assembly.
What length should I buy?
36″ or 4 ft lengths cover common fabrication needs. If you anticipate needs for multiple pieces, buy extra length and cut as required to minimize waste. Consider storage space and cutting capabilities when choosing length.
What are key fit considerations?
Check compatibility with fittings, connectors, and brackets. For DOM tubes and square profiles, straightness matters for alignment. Confirm tolerances and finish (mill finish vs. polished) to ensure proper welding or joining.
Best-fit scenarios
- Best for small, compact frames: 1.25″ OD steel with 0.120″ wall.
- Better for mid-size projects: 1.5″ OD steel with 0.120″ wall.
- Choose this if you need higher rigidity: 1.75″ OD DOM steel or 1.5″ × 1.5″ square steel.
- Ideal for lightweight or display frames: 1″ × 1″ aluminum tube.
- Flexibility across many projects: universal bung connectors for various tube walls.
FAQ
- What is “0.120 inch wall” in tubing?
- A wall thickness of 0.120 inch means the tube wall is 0.12″ thick, providing rigidity relative to its diameter.
- Can I weld all these tubes?
- Most steel tubes weld well with standard procedures; aluminum requires proper filler and technique to avoid warping.
- Is square tubing stronger than round for frames?
- Square tubing offers flat faces and easier mounting for brackets, but round tubes can handle certain bending loads differently; choose based on the application and connection methods.
- Do these tubes come with finishes?
- Finish varies by product; mill finishes may require deburring or coating for corrosion resistance depending on the environment.