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.
More
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 steel, which has fair corrosion resistance.
NPTF (Dryseal) threads are compatible with NPT threads. UN/UNF (SAE Straight) threads are also known as O-ring boss threads; the 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.
(SAE Straight) Male
Threads with Gasket
- For Use With: See table
- Specifications Met: See table
| Pipe Size (A)  | Dash Size (A) | Thread Size (B) | Dash Size (B) | Max. Pressure | For Use With | Specifications Met | Each | |
NPTF Female × UN/UNF (SAE Straight) Male | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/2 | 08 | 1 3/16"-12 | 14 | 5,000 psi @ 72° F | Air, Hydraulic Fluid, Water | ASTM A108 | 000000000 | 000000 |
| 3/4 | 12 | 1 3/16"-12 | 14 | 4,000 psi @ 72° F | Air, Hydraulic Fluid, Water | ASTM A108 | 000000000 | 00000 |
37° Flared Fittings for Stainless Steel Tubing
- Tubing: Use with welded or seamless 304 or 316 stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
- Specifications Met: ISO 8434, SAE J514, except fittings with BSPP and BSPT threads meet SAE J514 only
Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on tubing that is flared to 37°. They are 316 stainless steel for excellent corrosion resistance. Fittings require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.
BSPP threads and UN/UNF (SAE Straight) male threads have a gasket to protect against leaks. UN/UNF (SAE Straight) threads are also known as O-ring boss threads.
For technical drawings and 3-D models, click on a part number.
- For Use With: See table
- Temperature Range: See table
| For Tube OD | Pipe Size | Thread Size | For Use With | Material | Gasket Material | Max. Pressure | Temp. Range, ° F | Each | |
NPT Threads | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 7/8" | 3/4 | __ | Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water | 316 Stainless Steel | __ | 4,000 psi @ 72° F | -420 to 1200° | 000000000 | 0000000 |
UN/UNF (SAE Straight) Threads | |||||||||
| 3/4" | __ | 1 3/16"-12 | Air, Hydraulic Fluid, Isopropyl Alcohol, Water | 316 Stainless Steel | Buna-N Rubber | 5,000 psi @ 72° F | -30 to 250° | 000000000 | 00000 |
- For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
- Temperature Range: -420° to 1,200° F
Use these sleeves with a nut and fitting to provide a tight metal-to-metal seal on stainless steel tubing that is flared to 37°. Sleeves are 316 stainless steel for excellent corrosion resistance. They are also known as ferrules.
37° Flared Fittings for Steel Tubing
- 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.
- For Use With: See Table
- Temperature Range: See Table
| For Tube OD | Pipe Size | For Use With | Material | Max. Pressure | Temp. Range, °F | Each | |
NPTF Threads | |||||||
|---|---|---|---|---|---|---|---|
| 7/8" | 3/4 | Air, Fuel Oil, Hydraulic Fluid, Mineral Oil | Zinc-Plated Steel | 2,500 psi @ 72° F | -60° to 400° | 00000000 | 000000 |
- For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
- 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 × Metric Sleeve Adapters | |||||
| 7/8" | 20 | Zinc-Plated Steel | 2,500 psi @ 72° F | 000000000 | 00000 |
- For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
- Temperature Range: -60° to 400° F
| For Tube OD | Nut Material | Max. Pressure | Each | |
| 7/8" | Zinc-Plated Steel | 2,500 psi @ 72° F | 00000000 | 000000 |