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Precision Extreme-Pressure Stainless Steel Threaded Pipe Fittings
Made to tighter tolerances than other stainless steel pipe fittings, these are also known as instrumentation fittings. The male threads are rolled for extra strength in extreme-pressure applications. Fittings are commonly used to connect equipment in gas and hydraulic fluid lines. They are 316 stainless steel for excellent corrosion resistance. UN/UNF (SAE Straight) threads are also known as O-ring boss threads; the male threads have a gasket to prevent leaks.
For technical drawings and 3-D models, click on a part number.
Straight Connectors, Male
- For Use With: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water
- Specifications Met:
3/4 Pipe Size: ASME B1.20.1, ASME B31.3, ASTM A276, ASTM A479
All other sizes: ASME B1.20.1, ASME B31.1, ASME B31.3
316 Stainless Steel | |||||
|---|---|---|---|---|---|
Pipe Size | Dash Size | Max. Pressure | Max. Steam Pressure | Each | |
NPT Male | |||||
| 1/16 | __ | 10,000 psi @ 72° F | 10,000 psi @ 300° F | 000000000 | 000000 |
| 1/8 | 02 | 9,100 psi @ 72° F | 9,100 psi @ 300° F | 00000000 | 0000 |
| 1/4 | 04 | 7,500 psi @ 72° F | 7,500 psi @ 300° F | 00000000 | 00000 |
| 3/8 | 06 | 7,200 psi @ 72° F | 7,200 psi @ 300° F | 000000000 | 00000 |
| 1/2 | 08 | 6,600 psi @ 72° F | 6,600 psi @ 300° F | 000000000 | 00000 |
| 3/4 | 12 | 7,300 psi @ 72° F | 7,300 psi @ 300° F | 00000000 | 00000 |
Straight Connectors with Hex, Male
- For Use With: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water
- Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3
316 Stainless Steel | ||||||
|---|---|---|---|---|---|---|
| Pipe Size | Dash Size | Lg. | Max. Pressure | Max. Steam Pressure | Each | |
NPT Male | ||||||
| 1/16 | __ | 1 1/16" | 10,000 psi @ 72° F | 10,000 psi @ 300° F | 000000000 | 000000 |
| 1/16 | __ | 2" | 10,000 psi @ 72° F | 10,000 psi @ 300° F | 000000000 | 00000 |
| 1/16 | __ | 2 1/2" | 10,000 psi @ 72° F | 10,000 psi @ 300° F | 000000000 | 00000 |
| 1/16 | __ | 4" | 10,000 psi @ 72° F | 10,000 psi @ 300° F | 000000000 | 00000 |
| 1/8 | 02 | 1 1/16" | 9,100 psi @ 72° F | 9,100 psi @ 300° F | 00000000 | 0000 |
| 1/8 | 02 | 2" | 9,100 psi @ 72° F | 9,100 psi @ 300° F | 000000000 | 00000 |
| 1/8 | 02 | 2 1/2" | 9,100 psi @ 72° F | 9,100 psi @ 300° F | 000000000 | 00000 |
| 1/8 | 02 | 3" | 9,100 psi @ 72° F | 9,100 psi @ 300° F | 000000000 | 00000 |
| 1/8 | 02 | 4" | 9,100 psi @ 72° F | 9,100 psi @ 300° F | 000000000 | 00000 |
| 1/4 | 04 | 1 7/16" | 7,500 psi @ 72° F | 7,500 psi @ 300° F | 00000000 | 00000 |
| 1/4 | 04 | 2" | 7,500 psi @ 72° F | 7,500 psi @ 300° F | 00000000 | 00000 |
| 1/4 | 04 | 2 1/2" | 7,500 psi @ 72° F | 7,500 psi @ 300° F | 00000000 | 00000 |
| 1/4 | 04 | 3" | 7,500 psi @ 72° F | 7,500 psi @ 300° F | 00000000 | 00000 |
| 1/4 | 04 | 4" | 7,500 psi @ 72° F | 7,500 psi @ 300° F | 00000000 | 00000 |
| 3/8 | 06 | 1 7/16" | 7,200 psi @ 72° F | 7,200 psi @ 300° F | 000000000 | 00000 |
| 3/8 | 06 | 2" | 7,200 psi @ 72° F | 7,200 psi @ 300° F | 000000000 | 00000 |
| 3/8 | 06 | 2 1/2" | 7,200 psi @ 72° F | 7,200 psi @ 300° F | 000000000 | 00000 |
| 3/8 | 06 | 3" | 7,200 psi @ 72° F | 7,200 psi @ 300° F | 000000000 | 00000 |
| 3/8 | 06 | 4" | 7,200 psi @ 72° F | 7,200 psi @ 300° F | 000000000 | 00000 |
| 1/2 | 08 | 1 7/8" | 6,600 psi @ 72° F | 6,600 psi @ 300° F | 000000000 | 00000 |
| 1/2 | 08 | 2" | 6,600 psi @ 72° F | 6,600 psi @ 300° F | 000000000 | 00000 |
| 1/2 | 08 | 2 1/2" | 6,600 psi @ 72° F | 6,600 psi @ 300° F | 000000000 | 00000 |
| 1/2 | 08 | 3" | 6,600 psi @ 72° F | 6,600 psi @ 300° F | 000000000 | 00000 |
| 1/2 | 08 | 4" | 6,600 psi @ 72° F | 6,600 psi @ 300° F | 000000000 | 00000 |
| 3/4 | 12 | 1 27/32" | 7,300 psi @ 72° F | 7,300 psi @ 300° F | 000000000 | 00000 |
| 3/4 | 12 | 2" | 7,300 psi @ 72° F | 7,300 psi @ 300° F | 000000000 | 00000 |
| 3/4 | 12 | 3" | 7,300 psi @ 72° F | 7,300 psi @ 300° F | 000000000 | 00000 |
| 3/4 | 12 | 4" | 7,300 psi @ 72° F | 7,300 psi @ 300° F | 000000000 | 00000 |
| 1 | 16 | 2 5/16" | 5,300 psi @ 72° F | 5,300 psi @ 300° F | 000000000 | 00000 |
| 1 | 16 | 3" | 5,300 psi @ 72° F | 5,300 psi @ 300° F | 000000000 | 00000 |
| 1 | 16 | 4" | 5,300 psi @ 72° F | 5,300 psi @ 300° F | 000000000 | 00000 |
Straight Adapters, Male
Straight Adapter, Male Threaded Pipe
UN/UNF
(SAE Straight) Male
Threads with Gasket
(SAE Straight) Male
Threads with Gasket
- For Use With:
NPT × BSPP: Natural Gas, Water
NPT × BSPT and UN/UNF (SAE Straight) Male × NPT Male: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water - Specifications Met:
NPT × BSPP: ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A276, ASTM A479, ISO 228.1, ISO 228.2, ISO BS 2779
NPT × BSPT: ASME B1.20.1, ASME B31.1, ASME B31.3, ISO 7.1, ISO BS2.1
UN/UNF (SAE Straight) Male × NPT Male: ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A182, ASTM A276, ASTM A479, SAE J1926
| Pipe Size (A) | Thread Size (A) | Dash Size (A) | Pipe Size (B) | Dash Size (B) | Max. Pressure | Max. Steam Pressure | Each | |
NPT Male × BSPT Male | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/8 | __ | 02 | 1/8 | 02 | 9,100 psi @ 72° F | 9,100 psi @ 300° F | 0000000 | 000000 |
| 1/4 | __ | 04 | 1/4 | 04 | 7,500 psi @ 72° F | 7,500 psi @ 300° F | 0000000 | 00000 |
| 3/8 | __ | 06 | 3/8 | 06 | 7,200 psi @ 72° F | 7,200 psi @ 300° F | 0000000 | 00000 |
| 1/2 | __ | 08 | 1/2 | 08 | 6,600 psi @ 72° F | 6,600 psi @ 300° F | 0000000 | 00000 |
| 3/4 | __ | 12 | 3/4 | 12 | 6,400 psi @ 72° F | 6,400 psi @ 300° F | 0000000 | 00000 |
| 1 | __ | 16 | 1 | 16 | 4,600 psi @ 72° F | 4,600 psi @ 300° F | 0000000 | 00000 |
UN/UNF (SAE Straight) Male × NPT Male | ||||||||
| __ | 3/4"-16 | 08 | 1/2 | 08 | 4,500 psi @ 72° F | 4,500 psi @ 300° F | 000000000 | 00000 |
| __ | 1 1/16"-12 | 12 | 3/4 | 12 | 3,600 psi @ 72° F | 3,600 psi @ 300° F | 000000000 | 00000 |
| __ | 1 5/16"-12 | 18 | 1 | 18 | 2,900 psi @ 72° F | 2,900 psi @ 300° F | 000000000 | 00000 |
Straight Reducers, Male
- For Use With: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water
- Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3
Pipe Size | Dash Size | 316 Stainless Steel | |||||
|---|---|---|---|---|---|---|---|
| (A) | (B) | (A) | (B) | Max. Pressure | Max. Steam Pressure | Each | |
NPT Male | |||||||
| 1/8 | 1/16 | 02 | __ | 9,100 psi @ 72° F | 9,100 psi @ 300° F | 000000000 | 000000 |
| 1/4 | 1/8 | 04 | 02 | 7,500 psi @ 72° F | 7,500 psi @ 300° F | 00000000 | 00000 |
| 3/8 | 1/8 | 06 | 02 | 7,200 psi @ 72° F | 7,200 psi @ 300° F | 00000000 | 00000 |
| 3/8 | 1/4 | 06 | 04 | 7,200 psi @ 72° F | 7,200 psi @ 300° F | 000000000 | 00000 |
| 1/2 | 1/8 | 08 | 02 | 6,600 psi @ 72° F | 6,600 psi @ 300° F | 00000000 | 00000 |
| 1/2 | 1/4 | 08 | 04 | 6,600 psi @ 72° F | 6,600 psi @ 300° F | 000000000 | 00000 |
| 1/2 | 3/8 | 08 | 06 | 6,600 psi @ 72° F | 6,600 psi @ 300° F | 000000000 | 00000 |
| 3/4 | 1/4 | 12 | 04 | 7,300 psi @ 72° F | 7,300 psi @ 300° F | 000000000 | 00000 |
| 3/4 | 1/2 | 12 | 08 | 7,300 psi @ 72° F | 7,300 psi @ 300° F | 000000000 | 00000 |
| 1 | 1/2 | 16 | 08 | 5,300 psi @ 72° F | 5,300 psi @ 300° F | 000000000 | 00000 |
| 1 | 3/4 | 16 | 12 | 5,300 psi @ 72° F | 5,300 psi @ 300° F | 000000000 | 00000 |
90° Elbow Reducing Adapters
- For Use With: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water
- Specifications Met: See table
Pipe Size | Dash Size | 316 Stainless Steel | ||||||
|---|---|---|---|---|---|---|---|---|
| (A) | (B) | (A) | (B) | Max. Pressure | Max. Steam Pressure | Specifications Met | Each | |
NPT Female × NPT Male | ||||||||
| 1/2 | 1/4 | 08 | 04 | 4,900 psi @ 72° F | 4,900 psi @ 300° F | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A182, ASTM A276, ASTM A479 | 000000000 | 000000 |