Collection: Tube - Square - Brass

Tube (With Images)

Square

13 Products in this selection

Hollow square tubing for general hobby applications.
Some items may be available in longer or shorter lengths. e-mail sales@smallparts.com.au with enquiries.
Includes K&S Metals range and more

Miniature Bearings Australia (Minibearings)

Additional resources:

A more concise listing may be found on the Smallparts store at Tube - Square - Brass. Smallparts promote the most popular MBA products.

Outside Width (Ow)	Inside Width (Iw)	Length (L)	Indicative Image
Outside Width (Ow) 1.59 mm +/- 0.051 _{(0.063 in.)}	Inside Width (Iw) 0.88 mm +/- 0.076 _{(0.035 in.)}	Length (L) 304.8 mm +/- 1.0 _{(12 in.)}
Material: Brass Quantity Per Card: 2
Part Number: 4T-0016-0300-BR (2 Pcs) Square Tube - 1.59x0.88x304.8 mm - Brass 17 units (34 pcs) Available Immediately \| Further orders can be expected around Mon, Sep 22, 2025 Regular price $9.41 AUD Regular price Sale price $9.41 AUD Unit price per Per 2
Outside Width (Ow)	Inside Width (Iw)	Length (L)	Indicative Image
Outside Width (Ow) 1.59 mm +/- 0.051 _{(0.063 in.)}	Inside Width (Iw) 0.88 mm +/- 0.076 _{(0.035 in.)}	Length (L) 304.8 mm +/- 1.0 _{(12 in.)}
Material: Brass Quantity Per Card: 2
Part Number: 4T-0016-0300-BR (2 Pcs) Square Tube - 1.59x0.88x304.8 mm - Brass 17 units (34 pcs) Available Immediately \| Further orders can be expected around Mon, Sep 22, 2025 Regular price $9.41 AUD Regular price Sale price $9.41 AUD Unit price per Per 2 View the product page first if you are unsure.
4T-0016-0300-BR (2 Pcs) --- Square Tube - 1.59x0.88x304.8 mm - Brass 4T-0016-0300-BR (2 Pcs) --- Square Tube - 1.59x0.88x304.8 mm - Brass Regular price $9.41 AUD Regular price Sale price $9.41 AUD Unit price per 17 Available Now
Outside Width (Ow) 2.00 mm +/- 0.051 _{(0.079 in.)}	Inside Width (Iw) 1.10 mm +/- 0.076 _{(0.043 in.)}	Length (L) 300 mm +/- 1.0 _{(11.811 in.)}
Material: Brass Quantity Per Card: 2
Part Number: 4T-0020-0300-BR (2 Pcs) Square Tube - 2x1.1x300 mm - Brass 30 units (60 pcs) Available Immediately \| Item Discontinued - Up to 30 may be ordered online. No backorders. Please contact us if you need a larger quantity Regular price $4.59 AUD Regular price ~~$10.25 AUD~~ Sale price $4.59 AUD Unit price per Per 2
Outside Width (Ow) 2.00 mm +/- 0.051 _{(0.079 in.)}	Inside Width (Iw) 1.10 mm +/- 0.076 _{(0.043 in.)}	Length (L) 300 mm +/- 1.0 _{(11.811 in.)}
Material: Brass Quantity Per Card: 2
Part Number: 4T-0020-0300-BR (2 Pcs) Square Tube - 2x1.1x300 mm - Brass 30 units (60 pcs) Available Immediately \| Item Discontinued - Up to 30 may be ordered online. No backorders. Please contact us if you need a larger quantity Regular price $4.59 AUD Regular price ~~$10.25 AUD~~ Sale price $4.59 AUD Unit price per Per 2
4T-0020-0300-BR (2 Pcs) --- Square Tube - 2x1.1x300 mm - Brass Sale 4T-0020-0300-BR (2 Pcs) --- Square Tube - 2x1.1x300 mm - Brass Regular price $4.59 AUD Regular price ~~$10.25 AUD~~ Sale price $4.59 AUD Unit price per 30 Available Now Sale
Outside Width (Ow) 2.38 mm +/- 0.051 _{(0.094 in.)}	Inside Width (Iw) 1.67 mm +/- 0.076 _{(0.066 in.)}	Length (L) 304.8 mm +/- 1.0 _{(12 in.)}
Material: Brass Quantity Per Card: 2
Part Number: 4T-0024-0300-BR (2 Pcs) Square Tube - 2.38x1.67x304.8 mm - Brass 18 units (36 pcs) Available Immediately \| Item Discontinued - Up to 18 may be ordered online. No backorders. Please contact us if you need a larger quantity Regular price $5.59 AUD Regular price ~~$12.57 AUD~~ Sale price $5.59 AUD Unit price per Per 2
Outside Width (Ow) 2.38 mm +/- 0.051 _{(0.094 in.)}	Inside Width (Iw) 1.67 mm +/- 0.076 _{(0.066 in.)}	Length (L) 304.8 mm +/- 1.0 _{(12 in.)}
Material: Brass Quantity Per Card: 2
Part Number: 4T-0024-0300-BR (2 Pcs) Square Tube - 2.38x1.67x304.8 mm - Brass 18 units (36 pcs) Available Immediately \| Item Discontinued - Up to 18 may be ordered online. No backorders. Please contact us if you need a larger quantity Regular price $5.59 AUD Regular price ~~$12.57 AUD~~ Sale price $5.59 AUD Unit price per Per 2
4T-0024-0300-BR (2 Pcs) --- Square Tube - 2.38x1.67x304.8 mm - Brass Sale 4T-0024-0300-BR (2 Pcs) --- Square Tube - 2.38x1.67x304.8 mm - Brass Regular price $5.59 AUD Regular price ~~$12.57 AUD~~ Sale price $5.59 AUD Unit price per 18 Available Now Sale
Outside Width (Ow) 3.00 mm +/- 0.051 _{(0.118 in.)}	Inside Width (Iw) 2.10 mm +/- 0.076 _{(0.083 in.)}	Length (L) 300 mm +/- 1.0 _{(11.811 in.)}
Material: Brass Quantity Per Card: 2
Part Number: 4T-0030-0300-BR (2 Pcs) Square Tube - 3x2.1x300 mm - Brass 14 units (28 pcs) Available Immediately \| Item Discontinued - Up to 14 may be ordered online. No backorders. Please contact us if you need a larger quantity Regular price $5.23 AUD Regular price ~~$11.78 AUD~~ Sale price $5.23 AUD Unit price per Per 2
Outside Width (Ow) 3.00 mm +/- 0.051 _{(0.118 in.)}	Inside Width (Iw) 2.10 mm +/- 0.076 _{(0.083 in.)}	Length (L) 300 mm +/- 1.0 _{(11.811 in.)}
Material: Brass Quantity Per Card: 2
Part Number: 4T-0030-0300-BR (2 Pcs) Square Tube - 3x2.1x300 mm - Brass 14 units (28 pcs) Available Immediately \| Item Discontinued - Up to 14 may be ordered online. No backorders. Please contact us if you need a larger quantity Regular price $5.23 AUD Regular price ~~$11.78 AUD~~ Sale price $5.23 AUD Unit price per Per 2
4T-0030-0300-BR (2 Pcs) --- Square Tube - 3x2.1x300 mm - Brass Sale 4T-0030-0300-BR (2 Pcs) --- Square Tube - 3x2.1x300 mm - Brass Regular price $5.23 AUD Regular price ~~$11.78 AUD~~ Sale price $5.23 AUD Unit price per 14 Available Now Sale
Outside Width (Ow) 3.18 mm +/- 0.051 _{(0.125 in.)}	Inside Width (Iw) 2.46 mm +/- 0.076 _{(0.097 in.)}	Length (L) 304.8 mm +/- 1.0 _{(12 in.)}
Material: Brass
Part Number: 4T-0032-0300-BR Square Tube - 3.18x2.46x304.8 mm - Brass 15 Available Immediately \| Further orders can be expected around Mon, Sep 22, 2025 Regular price $8.41 AUD Regular price Sale price $8.41 AUD Unit price per Each
Outside Width (Ow) 3.18 mm +/- 0.051 _{(0.125 in.)}	Inside Width (Iw) 2.46 mm +/- 0.076 _{(0.097 in.)}	Length (L) 304.8 mm +/- 1.0 _{(12 in.)}
Material: Brass
Part Number: 4T-0032-0300-BR Square Tube - 3.18x2.46x304.8 mm - Brass 15 Available Immediately \| Further orders can be expected around Mon, Sep 22, 2025 Regular price $8.41 AUD Regular price Sale price $8.41 AUD Unit price per Each View the product page first if you are unsure.
4T-0032-0300-BR --- Square Tube - 3.18x2.46x304.8 mm - Brass 4T-0032-0300-BR --- Square Tube - 3.18x2.46x304.8 mm - Brass Regular price $8.41 AUD Regular price Sale price $8.41 AUD Unit price per 15 Available Now
Outside Width (Ow) 3.18 mm +/- 0.0635 _{(0.125 in.)}	Inside Width (Iw) 2.47 mm +/- 0.0635 _{(0.097 in.)}	Length (L) 914 mm _{(35.984 in.)}
Material: Brass
Part Number: 4T-0032-0914-BR Square Tube - 3.18x2.47x914 mm - Brass 5 Available Immediately \| Item Discontinued - Up to 5 may be ordered online. No backorders. Please contact us if you need a larger quantity Regular price $8.00 AUD Regular price ~~$15.20 AUD~~ Sale price $8.00 AUD Unit price per Each
Outside Width (Ow) 3.18 mm +/- 0.0635 _{(0.125 in.)}	Inside Width (Iw) 2.47 mm +/- 0.0635 _{(0.097 in.)}	Length (L) 914 mm _{(35.984 in.)}
Material: Brass
Part Number: 4T-0032-0914-BR Square Tube - 3.18x2.47x914 mm - Brass 5 Available Immediately \| Item Discontinued - Up to 5 may be ordered online. No backorders. Please contact us if you need a larger quantity Regular price $8.00 AUD Regular price ~~$15.20 AUD~~ Sale price $8.00 AUD Unit price per Each
4T-0032-0914-BR --- Square Tube - 3.18x2.47x914 mm - Brass Sale 4T-0032-0914-BR --- Square Tube - 3.18x2.47x914 mm - Brass Regular price $8.00 AUD Regular price ~~$15.20 AUD~~ Sale price $8.00 AUD Unit price per 5 Available Now Sale
Outside Width (Ow) 3.96 mm +/- 0.051 _{(0.156 in.)}	Inside Width (Iw) 3.25 mm +/- 0.076 _{(0.128 in.)}	Length (L) 304.8 mm +/- 1.0 _{(12 in.)}
Material: Brass
Part Number: 4T-0039-0300-BR Square Tube - 3.96x3.25x304.8 mm - Brass 30 Available Immediately \| Further orders can be expected around Mon, Sep 22, 2025 Regular price $8.32 AUD Regular price Sale price $8.32 AUD Unit price per Each
Outside Width (Ow) 3.96 mm +/- 0.051 _{(0.156 in.)}	Inside Width (Iw) 3.25 mm +/- 0.076 _{(0.128 in.)}	Length (L) 304.8 mm +/- 1.0 _{(12 in.)}
Material: Brass
Part Number: 4T-0039-0300-BR Square Tube - 3.96x3.25x304.8 mm - Brass 30 Available Immediately \| Further orders can be expected around Mon, Sep 22, 2025 Regular price $8.32 AUD Regular price Sale price $8.32 AUD Unit price per Each View the product page first if you are unsure.
4T-0039-0300-BR --- Square Tube - 3.96x3.25x304.8 mm - Brass 4T-0039-0300-BR --- Square Tube - 3.96x3.25x304.8 mm - Brass Regular price $8.32 AUD Regular price Sale price $8.32 AUD Unit price per 30 Available Now
Outside Width (Ow) 4.00 mm +/- 0.051 _{(0.157 in.)}	Inside Width (Iw) 3.10 mm +/- 0.076 _{(0.122 in.)}	Length (L) 300 mm +/- 1.0 _{(11.811 in.)}
Material: Brass Quantity Per Card: 2
Part Number: 4T-0040-0300-BR (2 Pcs) Square Tube - 4x3.1x300 mm - Brass 12 units (24 pcs) Available Immediately \| Further orders can be expected around Mon, Sep 22, 2025 Regular price $15.14 AUD Regular price Sale price $15.14 AUD Unit price per Per 2
Outside Width (Ow) 4.00 mm +/- 0.051 _{(0.157 in.)}	Inside Width (Iw) 3.10 mm +/- 0.076 _{(0.122 in.)}	Length (L) 300 mm +/- 1.0 _{(11.811 in.)}
Material: Brass Quantity Per Card: 2
Part Number: 4T-0040-0300-BR (2 Pcs) Square Tube - 4x3.1x300 mm - Brass 12 units (24 pcs) Available Immediately \| Further orders can be expected around Mon, Sep 22, 2025 Regular price $15.14 AUD Regular price Sale price $15.14 AUD Unit price per Per 2 View the product page first if you are unsure.
4T-0040-0300-BR (2 Pcs) --- Square Tube - 4x3.1x300 mm - Brass 4T-0040-0300-BR (2 Pcs) --- Square Tube - 4x3.1x300 mm - Brass Regular price $15.14 AUD Regular price Sale price $15.14 AUD Unit price per 12 Available Now
Outside Width (Ow) 4.76 mm +/- 0.051 _{(0.187 in.)}	Inside Width (Iw) 4.05 mm +/- 0.076 _{(0.159 in.)}	Length (L) 304.8 mm +/- 1.0 _{(12 in.)}
Material: Brass
Part Number: 4T-0048-0300-BR Square Tube - 4.76x4.05x304.8 mm - Brass 12 Available Immediately \| Further orders can be expected around Mon, Sep 22, 2025 Regular price $10.77 AUD Regular price Sale price $10.77 AUD Unit price per Each
Outside Width (Ow) 4.76 mm +/- 0.051 _{(0.187 in.)}	Inside Width (Iw) 4.05 mm +/- 0.076 _{(0.159 in.)}	Length (L) 304.8 mm +/- 1.0 _{(12 in.)}
Material: Brass
Part Number: 4T-0048-0300-BR Square Tube - 4.76x4.05x304.8 mm - Brass 12 Available Immediately \| Further orders can be expected around Mon, Sep 22, 2025 Regular price $10.77 AUD Regular price Sale price $10.77 AUD Unit price per Each View the product page first if you are unsure.
4T-0048-0300-BR --- Square Tube - 4.76x4.05x304.8 mm - Brass 4T-0048-0300-BR --- Square Tube - 4.76x4.05x304.8 mm - Brass Regular price $10.77 AUD Regular price Sale price $10.77 AUD Unit price per 12 Available Now
Outside Width (Ow) 5.00 mm +/- 0.051 _{(0.197 in.)}	Inside Width (Iw) 4.10 mm +/- 0.076 _{(0.161 in.)}	Length (L) 300 mm +/- 1.0 _{(11.811 in.)}
Material: Brass Quantity Per Card: 2
Part Number: 4T-0050-0300-BR (2 Pcs) Square Tube - 5x4.1x300 mm - Brass 15 units (30 pcs) Available Immediately \| Further orders can be expected around Mon, Sep 22, 2025 Regular price $15.32 AUD Regular price Sale price $15.32 AUD Unit price per Per 2
Outside Width (Ow) 5.00 mm +/- 0.051 _{(0.197 in.)}	Inside Width (Iw) 4.10 mm +/- 0.076 _{(0.161 in.)}	Length (L) 300 mm +/- 1.0 _{(11.811 in.)}
Material: Brass Quantity Per Card: 2
Part Number: 4T-0050-0300-BR (2 Pcs) Square Tube - 5x4.1x300 mm - Brass 15 units (30 pcs) Available Immediately \| Further orders can be expected around Mon, Sep 22, 2025 Regular price $15.32 AUD Regular price Sale price $15.32 AUD Unit price per Per 2 View the product page first if you are unsure.
4T-0050-0300-BR (2 Pcs) --- Square Tube - 5x4.1x300 mm - Brass 4T-0050-0300-BR (2 Pcs) --- Square Tube - 5x4.1x300 mm - Brass Regular price $15.32 AUD Regular price Sale price $15.32 AUD Unit price per 15 Available Now
Outside Width (Ow) 5.56 mm +/- 0.051 _{(0.219 in.)}	Inside Width (Iw) 4.85 mm +/- 0.076 _{(0.191 in.)}	Length (L) 304.8 mm +/- 1.0 _{(12 in.)}
Material: Brass
Part Number: 4T-0056-0300-BR Square Tube - 5.56x4.85x304.8 mm - Brass 15 Available Immediately \| Item Discontinued - Up to 15 may be ordered online. No backorders. Please contact us if you need a larger quantity Regular price $5.14 AUD Regular price ~~$11.66 AUD~~ Sale price $5.14 AUD Unit price per Each
Outside Width (Ow) 5.56 mm +/- 0.051 _{(0.219 in.)}	Inside Width (Iw) 4.85 mm +/- 0.076 _{(0.191 in.)}	Length (L) 304.8 mm +/- 1.0 _{(12 in.)}
Material: Brass
Part Number: 4T-0056-0300-BR Square Tube - 5.56x4.85x304.8 mm - Brass 15 Available Immediately \| Item Discontinued - Up to 15 may be ordered online. No backorders. Please contact us if you need a larger quantity Regular price $5.14 AUD Regular price ~~$11.66 AUD~~ Sale price $5.14 AUD Unit price per Each
4T-0056-0300-BR --- Square Tube - 5.56x4.85x304.8 mm - Brass Sale 4T-0056-0300-BR --- Square Tube - 5.56x4.85x304.8 mm - Brass Regular price $5.14 AUD Regular price ~~$11.66 AUD~~ Sale price $5.14 AUD Unit price per 15 Available Now Sale
Outside Width (Ow) 6.00 mm +/- 0.051 _{(0.236 in.)}	Inside Width (Iw) 5.10 mm +/- 0.076 _{(0.201 in.)}	Length (L) 300 mm +/- 1.0 _{(11.811 in.)}
Material: Brass Quantity Per Card: 2
Part Number: 4T-0060-0300-BR (2 Pcs) Square Tube - 6x5.1x300 mm - Brass 18 units (36 pcs) Available Immediately \| Further orders can be expected around Mon, Sep 22, 2025 Regular price $17.23 AUD Regular price Sale price $17.23 AUD Unit price per Per 2
Outside Width (Ow) 6.00 mm +/- 0.051 _{(0.236 in.)}	Inside Width (Iw) 5.10 mm +/- 0.076 _{(0.201 in.)}	Length (L) 300 mm +/- 1.0 _{(11.811 in.)}
Material: Brass Quantity Per Card: 2
Part Number: 4T-0060-0300-BR (2 Pcs) Square Tube - 6x5.1x300 mm - Brass 18 units (36 pcs) Available Immediately \| Further orders can be expected around Mon, Sep 22, 2025 Regular price $17.23 AUD Regular price Sale price $17.23 AUD Unit price per Per 2 View the product page first if you are unsure.
4T-0060-0300-BR (2 Pcs) --- Square Tube - 6x5.1x300 mm - Brass 4T-0060-0300-BR (2 Pcs) --- Square Tube - 6x5.1x300 mm - Brass Regular price $17.23 AUD Regular price Sale price $17.23 AUD Unit price per 18 Available Now
Outside Width (Ow) 6.35 mm +/- 0.051 _{(0.25 in.)}	Inside Width (Iw) 5.64 mm +/- 0.076 _{(0.222 in.)}	Length (L) 304.8 mm +/- 1.0 _{(12 in.)}
Material: Brass
Part Number: 4T-0064-0300-BR Square Tube - 6.35x5.64x304.8 mm - Brass 10 Available Immediately \| Further orders can be expected around Mon, Sep 22, 2025 Regular price $10.59 AUD Regular price Sale price $10.59 AUD Unit price per Each
Outside Width (Ow) 6.35 mm +/- 0.051 _{(0.25 in.)}	Inside Width (Iw) 5.64 mm +/- 0.076 _{(0.222 in.)}	Length (L) 304.8 mm +/- 1.0 _{(12 in.)}
Material: Brass
Part Number: 4T-0064-0300-BR Square Tube - 6.35x5.64x304.8 mm - Brass 10 Available Immediately \| Further orders can be expected around Mon, Sep 22, 2025 Regular price $10.59 AUD Regular price Sale price $10.59 AUD Unit price per Each View the product page first if you are unsure.
4T-0064-0300-BR --- Square Tube - 6.35x5.64x304.8 mm - Brass 4T-0064-0300-BR --- Square Tube - 6.35x5.64x304.8 mm - Brass Regular price $10.59 AUD Regular price Sale price $10.59 AUD Unit price per 10 Available Now