0.259" Tubing | McMaster-Carr

Seamless construction with no weld bead gives this tubing an interior with unrestricted flow. It is stronger than welded tubing and can be flared without splitting.

304 stainless steel has very good corrosion resistance.

316 stainless steel offers excellent corrosion resistance.

Tubing that meets ASTM specifications adheres to international standards for dimensions and materials.

For technical drawings and 3-D models, click on a part number.

Straights

Temperature Range:
304 Stainless Steel: -425° to 1500° F
316 Stainless Steel: -325° to 1500° F
Bending Method: Tube Bender
For Use With: Natural Gas, Water, Oil, Air
Compatible Tubing Fittings: Butt Weld, Compression, Flared, and Yor-Lok

304 Stainless Steel
OD	Wall Thick.	ID	Max. Pressure	Temper Rating	Specifications Met		1 ft.	3 ft.	6 ft.
3/8"	0.058"	0.259"	6,150 psi @ 72° F	Soft	ASTM A213, ASTM A269	000000000	000000	000000	000000
316 Stainless Steel
3/8"	0.058"	0.259"	3,050 psi @ 72° F	Soft	ASTM A213, ASTM A269	000000000	00000	000000	000000

General Purpose Aluminum Tubing

Temperature Range: -450° to 400° F
Bending Method: Tube Bender
Compatible Tube Fittings: Flared

This tubing is lightweight with good corrosion resistance and weldability. It has magnesium and silicon added for strength. Tubing is seamless, which provides a smooth interior for unrestricted flow. It can be flared without splitting.

Inch

For Use With Air, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Water
OD	Wall Thick.	ID	Max. Pressure	Temper	Temper Rating		1 ft.	3 ft.	6 ft.
3/8"	0.058"	0.259"	2,800 psi @ 72° F	T6	Hard	000000000	00000	000000	000000

Easy-to-Weld 4130 Alloy Steel Round Tubes

Yield Strength: See table
Hardness: See table
Heat Treatable: Yes
Max. Hardness After Heat Treatment: See table
Fabrication: Seamless
Specifications Met: See table

Also known as chrome-moly steel, these 4130 alloy steel round tubes have low carbon content for good weldability. They’re often used for roll cages and frames. To increase their wear resistance, you can harden them with heat treating. These tubes have been manufactured to SAE and military standards for quality and performance.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

0.058" Wall Thick.
OD	ID	Yield Strength	Hardness	Maximum Hardness After Heat Treatment	Specifications Met	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	4 ft. Lg.	6 ft. Lg.	8 ft. Lg.
3/8"	0.259"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	000000	000000	000000	000000

High-Strength 2024 Aluminum Tubes

Yield Strength: 42,000 psi
Hardness: Brinell 120 (Medium)
Temper: T3
Fabrication: Cold Drawn
Specifications Met: ASTM B210

While 2024 aluminum was initially designed for structural components in aircraft, it's now widely used when a high strength-to-weight ratio is needed, such as for gears, shafts, and fasteners. It offers similar performance to 7075 aluminum, but it’s not as strong.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

0.058" Wall Thick. (-0.006" to 0.006" Tolerance)
OD	OD Tolerance	ID	Heat Treatment	Temperature Range, °F		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
3/8"	-0.008" to 0.008"	0.259"	Hardened	-320° to 300°	0000000	000000	000000	000000

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About Metal Tubing

Smooth-Bore Seamless Stainless Steel Tubing

General Purpose Aluminum Tubing

Easy-to-Weld 4130 Alloy Steel Round Tubes

High-Strength 2024 Aluminum Tubes