About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron
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How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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About Metal Tubing
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Welded Steel Tubing
- Temperature Range: -65° to 800° F
- Bending Method: Tube Bender
A strong, high-pressure alternative to seamless tubing, this tubing is also known as DOM (drawn over mandrel). It is welded with a smoothed weld bead on the inside to reduce particle buildup. Tubing connects by welding. Do not use in corrosive environments.
For technical drawings and 3-D models, click on a part number.
| OD | Wall Thick. | ID | Max. Pressure | Temper Rating | 3 ft. | 6 ft. | |
For Use With Hydraulic Fluid and Natural Gas | |||||||
|---|---|---|---|---|---|---|---|
| 1/4" | 0.035" | 0.18" | 3,700 psi @ 72° F | Soft | 000000000 | ||
| 1/4" | 0.049" | 0.152" | 5,200 psi @ 72° F | Soft | 000000000 | ||
| 3/8" | 0.035" | 0.305" | 2,400 psi @ 72° F | Soft | 000000000 | ||
| 3/8" | 0.049" | 0.277" | 3,400 psi @ 72° F | Soft | 000000000 | ||
| 1/2" | 0.035" | 0.43" | 1,800 psi @ 72° F | Soft | 000000000 | ||
| 1/2" | 0.049" | 0.402" | 2,600 psi @ 72° F | Soft | 000000000 | ||
| 5/8" | 0.035" | 0.555" | 1,500 psi @ 72° F | Soft | 000000000 | ||
| 5/8" | 0.049" | 0.527" | 2,100 psi @ 72° F | Soft | 000000000 | ||
| 3/4" | 0.035" | 0.68" | 1,200 psi @ 72° F | Soft | 000000000 | ||
| 1" | 0.035" | 0.93" | 940 psi @ 72° F | Soft | 000000000 | ||
| 1 1/4" | 0.065" | 1.12" | 1,300 psi @ 72° F | Soft | 000000000 | ||
| 1 1/2" | 0.065" | 1.37" | 1,100 psi @ 72° F | Soft | 000000000 | ||
| 2" | 0.065" | 1.87" | 870 psi @ 72° F | Soft | 000000000 | ||
Vacuum-Rated Large-Diameter Steel Tubing
- Max. Temperature: Not Rated
- Bending Method: Tube Bender
- Compatible Fittings: Vacuum
This tubing has the strength to withstand vacuum applications up to 29" Hg. It is welded and has a weld bead on the inside.
Tubing with a galvanized finish offers better corrosion resistance than unfinished steel.
For technical drawings and 3-D models, click on a part number.
Steel | Galvanized Steel | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | ID | Max. Pressure | 5 ft. | 10 ft. | 5 ft. | 10 ft. | ||
For Use With Air and Plastic Pellets | |||||||||
| 2 1/8" | 0.065" | 1.995" | 150 psi @ 72° F | 0000000 | 00000000 | ||||
| 2 1/2" | 0.065" | 2.37" | 150 psi @ 72° F | 0000000 | 00000000 | ||||
| 3" | 0.065" | 2.87" | 150 psi @ 72° F | 0000000 | 00000000 | ||||
| 3 1/2" | 0.065" | 3.37" | 150 psi @ 72° F | 0000000 | 00000000 | ||||
| 4" | 0.065" | 3.87" | 150 psi @ 72° F | 0000000 | 00000000 | ||||
| 5" | 0.083" | 4.834" | 150 psi @ 72° F | 0000000 | 00000000 | ||||
| 6" | 0.083" | 5.834" | 150 psi @ 72° F | 0000000 | 00000000 | ||||
Easy-Fit Barbed Hose Fittings for Air and Water
Low-profile barbs and a longer first barb allow for a smoother, easier installation than other barbed fittings. Slide the barbed end into rubber hose and secure with a clamp.
Zinc-plated steel fittings have slightly better corrosion resistance than unplated steel fittings. Hose connectors are also known as hose menders and splicers. Use them to connect lengths of hose or to repair damaged hose.
For technical drawings and 3-D models, click on a part number.
- Maximum Pressure: 125 psi @ 72° F, except For 6" to 8" Hose IDs: 100 psi @ 72° F
- Maximum Vacuum: For 1/2" to 4" Hose IDs: 26 in. of Hg @ 72° F
- Temperature Range: -20° to 200° F
- Attachment Type: Use Worm-Drive Clamps, Bolt Clamps or Band-and-Buckle Clamps; except For 6" to 8" Hose IDs: Use Band-and-Buckle Clamps
- Specifications Met: See table
Low-Carbon Steel Round Tubes
Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It's widely fabricated into parts that don’t require high strength, such as fixture clamps, mounting plates, and spacers.
For technical drawings and 3-D models, click on a part number.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
- Yield Strength: See table
- Hardness: See table
- Heat Treatable: See table
- Specifcations Met: See table
| OD | OD Tolerance | ID | Yield Strength, psi  | Heat Treatable | Hardness | Specifications Met | 1 ft. Lg. | 3 ft. Lg. | 6 ft. Lg. | |
0.035" Wall Thick. (Standard Tolerance) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2" | -0.003" to 0.003" | 0.43" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
0.049" Wall Thick. (Standard Tolerance) | ||||||||||
| 1/2" | -0.003" to 0.003" | 0.402" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 5/8" | -0.003" to 0.003" | 0.527" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 3/4" | -0.003" to 0.003" | 0.652" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 1" | -0.004" to 0.004" | 0.902" | 45,000 | No | Rockwell B60 (Medium) | ASTM A513 | 00000000 | |||
| 1 1/2" | -0.005" to 0.005" | 1.402" | 45,000 | No | Rockwell B60 (Medium) | ASTM A513 | 00000000 | |||
| 2" | -0.005" to 0.005" | 1.902" | 45,000 | No | Rockwell B60 (Medium) | ASTM A513 | 00000000 | |||
0.065" Wall Thick. (Standard Tolerance) | ||||||||||
| 1/2" | -0.004" to 0.004" | 0.37" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 5/8" | -0.003" to 0.003" | 0.495" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 3/4" | -0.004" to 0.004" | 0.62" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 7/8" | -0.004" to 0.004" | 0.745" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 1" | -0.004" to 0.004" | 0.87" | 40,000 | No | Rockwell B60 (Medium) | ASTM A513 | 00000000 | |||
| 1 1/4" | -0.004" to 0.004" | 1.12" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 1 1/2" | -0.005" to 0.005" | 1.37" | 45,000 | No | Rockwell B60 (Medium) | ASTM A513 | 00000000 | |||
| 2" | -0.005" to 0.005" | 1.87" | 38,000 | No | Rockwell B60 (Medium) | ASTM A513 | 00000000 | |||
| 3" | -0.008" to 0.008" | 2.87" | 38,000 | No | Rockwell B60 (Medium) | ASTM A513 | 00000000 | |||
| 4" | -0.01" to 0.01" | 3.87" | 38,000 | No | Rockwell B60 (Medium) | ASTM A513 | 00000000 | |||
0.083" Wall Thick. (Standard Tolerance) | ||||||||||
| 5/8" | -0.004" to 0.004" | 0.459" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 3/4" | -0.004" to 0.004" | 0.584" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 7/8" | -0.004" to 0.004" | 0.709" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 1" | -0.004" to 0.004" | 0.834" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
0.095" Wall Thick. (Standard Tolerance) | ||||||||||
| 3/4" | -0.004" to 0.004" | 0.56" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 1" | -0.004" to 0.004" | 0.81" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 1 3/4" | -0.004" to 0.004" | 1.56" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
0.12" Wall Thick. (Standard Tolerance) | ||||||||||
| 3/4" | -0.004" to 0.004" | 0.51" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 7/8" | -0.004" to 0.004" | 0.635" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 1" | -0.004" to 0.004" | 0.76" | 38,000 | No | Rockwell B60 (Medium) | ASTM A513 | 00000000 | |||
| 1 1/8" | -0.004" to 0.004" | 0.885" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 1 1/4" | -0.004" to 0.004" | 1.01" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 1 1/2" | -0.005" to 0.005" | 1.26" | 38,000 | No | Rockwell B60 (Medium) | ASTM A513 | 00000000 | |||
| 1 3/4" | -0.004" to 0.004" | 1.51" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 2" | -0.004" to 0.004" | 1.76" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 2 1/4" | -0.004" to 0.004" | 2.01" | 30,000 | No | Rockwell B50 (Soft) | ASTM A513 | 0000000 | |||
| 3 1/2" | -0.009" to 0.009" | 3.26" | 38,000 | No | Rockwell B60 (Medium) | ASTM A513 | 00000000 | |||
| 4" | -0.01" to 0.01" | 3.76" | 38,000 | No | Rockwell B60 (Medium) | ASTM A513 | 00000000 | |||
| 4 1/2" | -0.02" to 0.02" | 4.26" | 38,000 | No | Rockwell B60 (Medium) | ASTM A513 | 00000000 | |||
0.134" Wall Thick. (Standard Tolerance) | ||||||||||
| 1 5/8" | -0.004" to 0.004" | 1.345" | 38,000 | No | Rockwell B60 (Medium) | ASTM A513 | 0000000 | |||
Low-Carbon Steel Rectangular Tubes
Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It's widely fabricated into parts that don’t require high strength, such as fixture clamps, mounting plates, and spacers. This material can be surface hardened with heat treating.
For technical drawings and 3-D models, click on a part number.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
- Yield Strength: See table
- Hardness: Not Rated
- Heat Treatable: Yes
- Max. Hardness After Heat Treatment: Not Rated
- Specifications Met: See table
Outside | Inside | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ht. | Ht. Tolerance | Wd. | Wd. Tolerance | Ht. | Wd. | Yield Strength, psi | Specifications Met | Straightness Tolerance | 1 ft. Lg. | 3 ft. Lg. | 6 ft. Lg. | |
0.049" Wall Thick. (-0.005" to 0.005" Tolerance) | ||||||||||||
| 1/2" | -0.004" to 0.004" | 1/2" | -0.004" to 0.004" | 0.402" | 0.402" | Not Rated | ASTM A513 | __ | 0000000 | |||
| 5/8" | -0.004" to 0.004" | 5/8" | -0.004" to 0.004" | 0.527" | 0.527" | Not Rated | ASTM A513 | __ | 0000000 | |||
| 3/4" | -0.005" to 0.005" | 3/4" | -0.005" to 0.005" | 0.652" | 0.652" | Not Rated | ASTM A513 | __ | 0000000 | |||
0.065" Wall Thick. (-0.007" to 0.007" Tolerance) | ||||||||||||
| 1/2" | -0.03" to 0.03" | 1/2" | -0.03" to 0.03" | 0.37" | 0.37" | 32,000 | ASTM A513 | 1/16" per 3 ft. | 00000000 | |||
| 1/2" | -0.005" to 0.005" | 1" | -0.005" to 0.005" | 0.37" | 0.87" | Not Rated | ASTM A513 | __ | 0000000 | |||
| 5/8" | -0.004" to 0.004" | 5/8" | -0.004" to 0.004" | 0.495" | 0.495" | Not Rated | ASTM A513 | __ | 0000000 | |||
| 3/4" | -0.03" to 0.03" | 3/4" | -0.03" to 0.03" | 0.62" | 0.62" | 32,000 | ASTM A513 | 1/16" per 3 ft. | 00000000 | |||
| 1" | -0.03" to 0.03" | 1" | -0.03" to 0.03" | 0.87" | 0.87" | 32,000 | ASTM A513 | 1/16" per 3 ft. | 00000000 | |||
| 1" | -0.01" to 0.01" | 3" | -0.01" to 0.01" | 0.87" | 2.87" | Not Rated | ASTM A513 | __ | 0000000 | |||
| 1" | -0.008" to 0.008" | 2" | -0.008" to 0.008" | 0.87" | 1.87" | Not Rated | ASTM A513 | __ | 0000000 | |||
| 1" | -0.006" to 0.006" | 1 1/2" | -0.006" to 0.006" | 0.87" | 1.37" | Not Rated | ASTM A513 | __ | 0000000 | |||
| 1 1/4" | -0.03" to 0.03" | 1 1/4" | -0.03" to 0.03" | 1.12" | 1.12" | 32,000 | ASTM A513 | 1/16" per 3 ft. | 00000000 | |||
| 2" | -0.008" to 0.008" | 2" | -0.008" to 0.008" | 1.87" | 1.87" | Not Rated | ASTM A513 | __ | 0000000 | |||
0.083" Wall Thick. (-0.008" to 0.008" Tolerance) | ||||||||||||
| 3/4" | -0.03" to 0.03" | 3/4" | -0.03" to 0.03" | 0.584" | 0.584" | 32,000 | ASTM A513 | 1/16" per 3 ft. | 00000000 | |||
| 3/4" | -0.006" to 0.006" | 1 1/2" | -0.006" to 0.006" | 0.584" | 1.334" | Not Rated | ASTM A513 | __ | 000000 | |||
| 1" | -0.03" to 0.03" | 1" | -0.03" to 0.03" | 0.834" | 0.834" | 32,000 | ASTM A513 | 1/16" per 3 ft. | 00000000 | |||
| 1" | -0.01" to 0.01" | 1 1/2" | -0.01" to 0.01" | 0.834" | 1.334" | Not Rated | ASTM A513 | __ | 0000000 | |||
| 1" | -0.01" to 0.01" | 3" | -0.01" to 0.01" | 0.834" | 2.834" | Not Rated | ASTM A513 | __ | 0000000 | |||
| 1" | -0.008" to 0.008" | 2" | -0.008" to 0.008" | 0.834" | 1.834" | Not Rated | ASTM A513 | __ | 0000000 | |||
| 1 1/4" | -0.006" to 0.006" | 1 1/4" | -0.006" to 0.006" | 1.084" | 1.084" | Not Rated | ASTM A513 | __ | 0000000 | |||
| 1 1/2" | -0.03" to 0.03" | 1 1/2" | -0.03" to 0.03" | 1.334" | 1.334" | 32,000 | ASTM A513 | 1/16" per 3 ft. | 00000000 | |||
| 2" | -0.03" to 0.03" | 2" | -0.03" to 0.03" | 1.834" | 1.834" | 32,000 | ASTM A513 | 1/16" per 3 ft. | 00000000 | |||
| 2" | -0.02" to 0.02" | 4" | -0.02" to 0.02" | 1.834" | 3.834" | Not Rated | ASTM A513 | __ | 0000000 | |||
| 2 1/2" | -0.01" to 0.01" | 2 1/2" | -0.01" to 0.01" | 2.334" | 2.334" | Not Rated | ASTM A513 | __ | 0000000 | |||
0.12" Wall Thick. (-0.012" to 0.012" Tolerance) | ||||||||||||
| 3/4" | -0.005" to 0.005" | 3/4" | -0.005" to 0.005" | 0.51" | 0.51" | Not Rated | ASTM A513 | __ | 0000000 | |||
| 1" | -0.008" to 0.008" | 2" | -0.008" to 0.008" | 0.76" | 1.76" | Not Rated | ASTM A513 | __ | 0000000 | |||
| 1" | -0.006" to 0.006" | 1 1/2" | -0.006" to 0.006" | 0.76" | 1.26" | Not Rated | ASTM A513 | __ | 0000000 | |||
| 1 1/4" | -0.006" to 0.006" | 1 1/4" | -0.006" to 0.006" | 1.01" | 1.01" | Not Rated | ASTM A513 | __ | 0000000 | |||
| 1 1/2" | -0.03" to 0.03" | 1 1/2" | -0.03" to 0.03" | 1.26" | 1.26" | 32,000 | ASTM A513 | 1/16" per 3 ft. | 00000000 | |||
Weld-Together Framing and Fittings
Create strong structures by welding this framing together. Add metal panels to close off openings. Slide the rail into the fitting and weld in place.
For technical drawings and 3-D models, click on a part number.
