Steel, tube & firewall

4130 Square and Rectangular Tubing (MIL-T-6736)

Square and rectangular 4130 airframe tube, normalized, to MIL-T-6736.

Where to buy

AmericaDistributor coming soonOur partner for this region is on its way

EuropeDistributor coming soonOur partner for this region is on its way

OceaniaDistributor coming soonOur partner for this region is on its way

AmericaMore distributors coming soon

EuropeMore distributors coming soon

OceaniaMore distributors coming soon

Round tube in the same alloy: 4130 round tubing. Streamline: 4130 streamline.

Test reports are available for a minimum charge per order.

Source: a distributor's listing, checked 2026-09-30.

Sizes listed 14 rows

Size (in.)	Wall (in.)	Weight per ft (lb)	Part No.
1/2 x 1/2	.035	0.221	03-12200
1/2 x 1	.065	0.606	03-12350
5/8 x 5/8	.035	0.281	03-12400
5/8 x 5/8	.049	0.423	03-12500
5/8 x 5/8	.065	0.388	03-12600
3/4 x 3/4	.035	0.340	03-12700
3/4 x 3/4	.049	0.467	03-12800
3/4 x 3/4	.065	0.606	03-13000
7/8 x 7/8	.065	0.716	03-13300
1 x 1	.035	0.567	03-13400
1 x 1	.049	0.634	03-13500
1 x 1	.065	0.827	03-13700
3/4 x 1-1/2	.049	0.906	03-13900
1 x 1-3/4	.065	1.158	03-13950

What is the 4130 Airframe Square & Rectangular Tubing MIL-T-6736 Normalized made of?

4130, normalized, according to the distributor listing checked on 2026-09-30.

What specification does the 4130 Airframe Square & Rectangular Tubing MIL-T-6736 Normalized meet?

MIL-T-6736, according to the distributor listing checked on 2026-09-30.

What sizes of the 4130 Airframe Square & Rectangular Tubing MIL-T-6736 Normalized are listed?

14, from 1/2" × 1/2" to 1" × 1-3/4", according to the distributor listing checked on 2026-09-30.

Where can I buy the 4130 Airframe Square & Rectangular Tubing MIL-T-6736 Normalized?

A distributor we checked lists it in the Americas. The link to its page, with the live price and stock, opens when the partnership does.

4130 Airframe Square & Rectangular Tubing MIL-T-6736 NormalizedWhere to buy