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 zinc-plated steel, which have better corrosion resistance than plain steel fittings.
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.
(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 | Material | 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 | Zinc Plated Steel | Air, Hydraulic Fluid, Water | ASTM A108 | 000000000 | 000000 |
| 3/4 | 12 | 1 3/16"-12 | 14 | 4,000 psi @ 72° F | Zinc Plated Steel | 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 withstand high pressure, so they’re often used in hydraulic applications. Made from 316 stainless steel, they resist corrosion from water and chemicals. A complete fitting requires 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 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 | 000000 |
- 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.
Nuts for 37° Flared Fittings for Stainless Steel Tubing
- For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
- Temperature Range: -420° to 1,200° F
- Tubing: Use with seamless or welded 304 or 316 stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
- Specifications Met: ISO 8434, SAE J514
Use these nuts with a sleeve and fitting to provide a tight metal-to-metal seal on stainless steel tubing that is flared to 37°. Nuts are 316 stainless steel for excellent corrosion resistance.
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.
- Temperature Range: See table
| For Tube OD | Pipe Size | Material | Max. Pressure | Temp. Range, °F | Each | |
NPTF Threads | ||||||
|---|---|---|---|---|---|---|
| 7/8" | 3/4 | Zinc-Plated Steel | 2,500 psi @ 72° F | -60° to 400° | 00000000 | 000000 |
- Temperature Range: -60° to 400° F
| For Tube OD | Material | Max. Pressure | Each | |
| 7/8" | Zinc-Plated Steel | 2,500 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 × Metric Sleeve Adapters | |||||
| 7/8" | 20 | Zinc-Plated Steel | 2,500 psi @ 72° F | 000000000 | 000000 |
- 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 |
Nuts for 37° Flared Fittings for Steel Tubing
- For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
- Temp. Range: -60° to 400° F
- Tubing: Use with seamless steel
- Specifications Met: SAE J514
Use these nuts with a sleeve and fitting to provide a tight metal-to-metal seal on steel tubing that is flared to 37°. They are zinc-plated steel for fair corrosion resistance.
| For Tube OD | Nut Material | Max. Pressure | Each | |
| 7/8" | Zinc-Plated Steel | 2,500 psi @ 72° F | 00000000 | 000000 |
Crimp-On Hose Fittings for Hydraulic Fluid
Crimp these fittings onto hydraulic hose for a permanent, leak-tight connection. Since they crimp on, they handle higher pressure than screw-on fittings. To install, use Parker crimping tools and dies (not included).
Fittings with a female end swivel 360° until tightened without you needing to move or twist the entire hose, making them easy to install.
Fittings with an O-ring face seal end are also known as Seal-Lok fittings.
Note: Fittings are only for use with hydraulic hose.
- Maximum Pressure: See table
- Temperature Range: -40° to 210° F
- For Hose Manufacturer Series:
Parker 43 Series Fittings: 302 SAE J517 100R2AT, 422 SAE J517 100R1AT, 487 ISO17582-AC, 777 ISO17582-CC
Parker 56 Series Fittings: 510D J517 SAE 100R7, 518D J517 SAE 100R7