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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Compact Extreme-Pressure Steel Threaded Pipe Fittings
These fittings are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces. They are galvanized and zinc-plated steel, which have better corrosion resistance than plain steel fittings.
Through-wall fittings are also known as bulkhead couplings; they mount through your wall to create an inlet or outlet. When installing, the gasket should be on the inside of the wall. BSPP and metric male threads have either a gasket, or a gasket and washer, to prevent leaks.
For technical drawings and 3-D models, click on a part number.
Threads with
Gasket and Washer
- For Use With: Air, Hydraulic Fluid, Oil, Water
- Specifications Met: ISO 1179, ISO 8434-6
Pipe Size | Dash Size | For Hole Dia., mm | For Max. Wall Thick., mm | Max. Pressure | Material | Each | |
BSPP Male | |||||||
|---|---|---|---|---|---|---|---|
| 1/4 | 04 | 13 | 11.5 | 6,500 psi @ 72° F | Galvanized Steel | 00000000 | 00000 |
| 3/8 | 06 | 16.5 | 13.9 | 5,500 psi @ 72° F | Galvanized Steel | 00000000 | 00000 |
| 1/2 | 08 | 20.8 | 12.7 | 4,500 psi @ 72° F | Galvanized Steel | 00000000 | 00000 |
| 3/4 | 12 | 26.3 | 11.5 | 3,500 psi @ 72° F | Galvanized Steel | 00000000 | 00000 |
| 1 | 16 | 33.1 | 12.7 | 3,000 psi @ 72° F | Galvanized Steel | 00000000 | 00000 |
37° Flared Fittings for Steel Tubing
- For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil
- Tubing: Use with seamless steel
- Specifications Met: SAE J514
Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on tubing that is flared to 37°. They require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately. Fittings are zinc-plated steel for fair corrosion resistance.
NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- Temperature Range: -60° to 400° F
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
- Temperature Range: -60° to 400° F
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
| For Tube OD | Material | Max. Pressure | Each | |
| 3/16" | Zinc-Plated Steel | 7,500 psi @ 72° F | 000000000 | 000000 |
| 1/4" | Zinc-Plated Steel | 1,250 psi @ 72° F | 000000000 | 0000 |
| 5/16" | Zinc-Plated Steel | 6,000 psi @ 72° F | 000000000 | 00000 |
| 3/8" | Zinc-Plated Steel | 1,250 psi @ 72° F | 000000000 | 00000 |
| 1/2" | Zinc-Plated Steel | 1,250 psi @ 72° F | 000000000 | 00000 |
| 3/4" | Zinc-Plated Steel | 1,250 psi @ 72° F | 000000000 | 00000 |
| 1" | Zinc-Plated Steel | 4,500 psi @ 72° F | 000000000 | 00000 |
| 1 1/2" | Zinc-Plated Steel | 3,000 psi @ 72° F | 000000000 | 00000 |
| 2" | Zinc-Plated Steel | 2,000 psi @ 72° F | 000000000 | 000000 |
- Temperature Range: -60° to 400° F
Use these sleeves with a nut and fitting to provide a tight metal-to-metal seal on steel tubing that is flared to 37°. Sleeves are zinc-plated steel for fair corrosion resistance. They are also known as ferrules.
Inch × metric sleeve adapters convert the fitting from inch to metric.
For Tube OD | |||||
|---|---|---|---|---|---|
| Inch | Metric, mm | Sleeve Material | Max. Pressure | Each | |
Inch Sleeves | |||||
| 1/8" | __ | Zinc-Plated Steel | 5,000 psi @ 72° F | 00000000 | 00000 |
| 1/4" | __ | Zinc-Plated Steel | 4,500 psi @ 72° F | 000000000 | 000 |
| 5/16" | __ | Zinc-Plated Steel | 4,000 psi @ 72° F | 000000000 | 0000 |
| 3/8" | __ | Zinc-Plated Steel | 4,000 psi @ 72° F | 000000000 | 000 |
| 1/2" | __ | Zinc-Plated Steel | 4,000 psi @ 72° F | 000000000 | 0000 |
| 3/4" | __ | Zinc-Plated Steel | 3,000 psi @ 72° F | 000000000 | 0000 |
| 1" | __ | Zinc-Plated Steel | 2,500 psi @ 72° F | 000000000 | 0000 |
| 1 1/2" | __ | Zinc-Plated Steel | 1,500 psi @ 72° F | 00000000 | 00000 |
Inch × Metric Sleeve Adapters | |||||
| 5/16" | 8 | Zinc-Plated Steel | 4,000 psi @ 72° F | 000000000 | 0000 |
- Temperature Range: -60° to 400° F
| For Tube OD | Nut Material | Max. Pressure | Each | |
| 1/8" | Zinc-Plated Steel | 5,000 psi @ 72° F | 00000000 | 000000 |
| 1/4" | Zinc-Plated Steel | 4,500 psi @ 72° F | 000000000 | 000 |
| 5/16" | Zinc-Plated Steel | 4,000 psi @ 72° F | 000000000 | 0000 |
| 3/8" | Zinc-Plated Steel | 4,000 psi @ 72° F | 000000000 | 000 |
| 1/2" | Zinc-Plated Steel | 4,000 psi @ 72° F | 000000000 | 0000 |
| 3/4" | Zinc-Plated Steel | 3,000 psi @ 72° F | 000000000 | 0000 |
| 1" | Zinc-Plated Steel | 2,500 psi @ 72° F | 000000000 | 0000 |
| 1 1/2" | Zinc-Plated Steel | 1,500 psi @ 72° F | 00000000 | 00000 |
Yor-Lok Fittings for Steel Tubing
- For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Mineral Oil
- Tubing: Use with seamless steel
- Specifications Met: See table
A nut with two sleeves (ferrules) gives these fittings extra gripping power. The sleeves bite into tubing as you tighten the nut, creating a strong seal. Also known as instrumentation fittings, they are made to tight tolerances for use in high-precision applications. Fittings are zinc-plated steel for fair corrosion resistance. They are compatible with Swagelok®, Let-Lok, and A-Lok fittings.
For technical drawings and 3-D models, click on a part number.
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
For Tube | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| OD, mm | Wall Thick., mm | Pipe Size | Material | Max. Pressure | Temp. Range, °F | For Hole Dia., mm | For Max. Wall Thick., mm | Specifications Met | Each | |
NPT Threads | ||||||||||
| 6 | 0.8 | 1/8 | Zinc-Plated Steel | 4,400 psi @ 72° F | -20° to 800° | 11.5 | 10.2 | ASME B31.3 | 00000000 | 00000 |
| 6 | 0.8 | 1/4 | Zinc-Plated Steel | 4,400 psi @ 72° F | -20° to 800° | 11.5 | 10.2 | ASME B31.3 | 00000000 | 0000 |
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
For Tube | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | Material | Max. Pressure | Temp. Range, °F | For Hole Dia. | For Max. Wall Thick. | Specifications Met | Each | |
| 1/8" | 0.035" | Zinc-Plated Steel | 6,800 psi @ 72° F | -20° to 395° | 5/16" | 1/2" | ASTM A108 | 00000000 | 000000 |
| 1/4" | 0.035" | Zinc-Plated Steel | 4,900 psi @ 72° F | -20° to 395° | 7/16" | 13/32" | ASTM A108 | 00000000 | 00000 |
| 3/8" | 0.035" | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | 9/16" | 7/16" | ASTM A108 | 00000000 | 00000 |
| 1/2" | 0.035" | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | 3/4" | 1/2" | ASTM A108 | 00000000 | 00000 |
For Tube | |||||||
|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | Nut Material | Max. Pressure | Temp. Range, °F | Specifications Met | Each | |
| 1/8" | 0.035" | Zinc-Plated Steel | 6,800 psi @ 72° F | -20° to 395° | ASTM A108 | 00000000 | 00000 |
| 1/4" | 0.035" | Zinc-Plated Steel | 4,900 psi @ 72° F | -20° to 395° | ASTM A108 | 00000000 | 0000 |
| 3/8" | 0.035" | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | ASTM A108 | 00000000 | 0000 |
| 1/2" | 0.035" | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASTM A108 | 00000000 | 0000 |
| 6mm | 0.8mm | Zinc-Plated Steel | 4,400 psi @ 72° F | -20° to 800° | ASME B31.3 | 00000000 | 0000 |
For Tube | ||||||||
|---|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | Front Sleeve Material | Back Sleeve Material | Max. Pressure | Temp. Range, °F | Specifications Met | Each | |
| 1/8" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 6,800 psi @ 72° F | -20° to 800° | ASME B31.3 | 00000000 | 00000 |
| 1/4" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 4,850 psi @ 72° F | -20° to 800° | ASME B31.3 | 00000000 | 0000 |
| 3/8" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 3,100 psi @ 72° F | -20° to 800° | ASME B31.3 | 00000000 | 00000 |
| 1/2" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 2,300 psi @ 72° F | -20° to 800° | ASME B31.3 | 00000000 | 00000 |
| 6mm | 0.8mm | Zinc-Plated Steel | 316 Stainless Steel | 4,400 psi @ 72° F | -20° to 800° | ASME B31.3 | 00000000 | 0000 |
Compression Fittings for Steel Tubing
- For Use With: Inch: Air, Hydraulic Fluid, Water
Metric: Hydraulic Fluid - Tubing: Inch: Use with welded steel
Metric: Use with seamless steel - Specifications Met: Inch: SAE J514
Metric: ISO 8434, DIN 2353
A single sleeve (ferrule) bites into tubing as you tighten the nut, creating a strong seal. The nut and sleeve are included. Fittings are also known as flareless and bite fittings.
Zinc-plated steel fittings have fair corrosion resistance.
For technical drawings and 3-D models, click on a part number.
- Temperature Range: See table
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
For Tube | ||||||||
|---|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | Material | Max. Pressure | Temp. Range, °F | For Hole Dia. | For Max. Wall Thick. | Each | |
| 1/4" | 0.035" | Zinc-Plated Steel | 4,000 psi @ 72° F | -65° to 400° | 7/16" | 3/8" | 000000000 | 000000 |
| 3/8" | 0.035" | Zinc-Plated Steel | 3,000 psi @ 72° F | -65° to 400° | 9/16" | 13/32" | 000000000 | 0000 |
| 1/2" | 0.049" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 3/4" | 13/32" | 000000000 | 00000 |
| 3/4" | 0.065" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 1 1/16" | 7/16" | 000000000 | 00000 |
| 6mm | Not Rated | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 13mm | 23mm | 00000000 | 00000 |
| 8mm | Not Rated | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 15mm | 24mm | 00000000 | 00000 |
| 10mm | Not Rated | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 17mm | 24mm | 00000000 | 00000 |
| 12mm | Not Rated | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 19mm | 25mm | 00000000 | 00000 |
- Temperature Range: See table
| For Tube OD | Nut Material | Max. Pressure | Temp. Range, °F | Each | |
| 1/4" | Zinc-Plated Steel | 4,000 psi @ 72° F | -65° to 400° | 000000000 | 00000 |
| 3/8" | Zinc-Plated Steel | 3,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 1/2" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 3/4" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 6mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 8mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 10mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 12mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
- Temperature Range: See table
| For Tube OD | Sleeve Material | Max. Pressure | Temp. Range, °F | Each | |
| 1/4" | Zinc-Plated Steel | 4,000 psi @ 72° F | -65° to 400° | 000000000 | 00000 |
| 3/8" | Zinc-Plated Steel | 3,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 1/2" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 3/4" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 6mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 000 |
| 8mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 000 |
| 10mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 000 |
| 12mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 000 |