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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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Nuts for Ultra-High-Polish Gasket Fittings for Stainless Steel Tubing
Male
Female
- For Use With: Carbon Dioxide, Ammonia, Chloride, Fluoride, Fluorocarbon, Germane, Halide, Helium, Hydrogen, Argon, Krypton, Nitrogen, Laser Gas, Natural Gas, Butane, Xenon, Silane, Sulfur Hexafluoride, Tungsten Hexafluoride, Oxygen
- Temperature Range: -420° to 1000° F
- Tubing: Use with 316/316L stainless steel
- Compatible With: Swagelok® VCR
Nuts are 316 stainless steel for excellent corrosion resistance.
To connect two butt-weld adapters, use a male nut and a female nut. To connect a threaded adapter or a Yor-Lok adapter with a butt-weld adapter, use a female nut. Nuts and adapters are sold separately.
| For Tube OD | Nut Material | Max. Pressure | Max. Vacuum | Lg. | Each | |
Male | ||||||
|---|---|---|---|---|---|---|
| 1/8" | 316L Stainless Steel | 8,500 psi @ 72° F | 10 -11 torr @ 72° F | 1/2" | 00000000 | 00000 |
| 1/4" | 316L Stainless Steel | 5,100 psi @ 72° F | 10 -11 torr @ 72° F | 17/32" | 00000000 | 0000 |
| 1/4" | 316L Stainless Steel | 5,100 psi @ 72° F | 10 -11 torr @ 72° F | 23/32" | 0000000 | 0000 |
| 1/2" | 316L Stainless Steel | 3,500 psi @ 72° F | 10 -11 torr @ 72° F | 13/16" | 0000000 | 00000 |
| 3/4" | 316L Stainless Steel | 3,350 psi @ 72° F | 10 -11 torr @ 72° F | 1" | 00000000 | 00000 |
| 1" | 316L Stainless Steel | 2,400 psi @ 72° F | 10 -11 torr @ 72° F | 1 3/16" | 00000000 | 00000 |
Female | ||||||
| 1/8" | 316L Stainless Steel | 8,500 psi @ 72° F | 10 -11 torr @ 72° F | 17/32" | 00000000 | 0000 |
| 1/4" | 316L Stainless Steel | 5,100 psi @ 72° F | 10 -11 torr @ 72° F | 13/16" | 0000000 | 0000 |
| 1/2" | 316L Stainless Steel | 3,500 psi @ 72° F | 10 -11 torr @ 72° F | 7/8" | 0000000 | 00000 |
| 3/4" | 316L Stainless Steel | 3,350 psi @ 72° F | 10 -11 torr @ 72° F | 1 1/8" | 00000000 | 00000 |
| 1" | 316L Stainless Steel | 2,400 psi @ 72° F | 10 -11 torr @ 72° F | 1 11/32" | 00000000 | 00000 |
Quick-Install Pressure Test Fittings
 |  NPT Female Inlet × NPT Male Outlet Adapter with Intermittent Swivel |  NPT Male Inlet × NPT Female Outlet Adapter |
 NPT Male Inlet × NPT Female Outlet Adapter with Intermittent Swivel |  NPT Male Inlet Plug |
Thread these fittings onto your testing equipment by hand for a secure connection in testing applications—no tools, tape, or sealant required. Use them with gauges and other equipment as a temporary connection. When pressure is applied, the O-ring on the outlet presses against the testing equipment, creating a tight seal.
Adapters with intermittent swivel rotate 360° until tightened for easy installation.
| Pipe Size | Max. Pressure, psi | Temperature Range, °F | Gasket Material | For Use With | Each | |
NPT Female Inlet × NPT Male Outlet Adapter with Intermittent Swivel | ||||||
|---|---|---|---|---|---|---|
416 Stainless Steel | ||||||
| 1/8 × 1/8 | 5,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 0000000 |
| 1/4 × 1/4 | 5,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 3/8 × 3/8 | 4,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 1/2 × 1/2 | 4,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 3/4 × 3/4 | 4,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 1 × 1 | 4,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
NPT Male Inlet × NPT Female Outlet Adapter | ||||||
416 Stainless Steel | ||||||
| 1/8 × 1/8 | 5,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 1/4 × 1/4 | 5,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 3/8 × 3/8 | 4,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 1/2 × 1/2 | 4,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 3/4 × 3/4 | 4,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 1 × 1 | 4,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
NPT Male Inlet × NPT Female Outlet Adapter with Intermittent Swivel | ||||||
416 Stainless Steel | ||||||
| 1/8 × 1/8 | 5,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 1/4 × 1/4 | 5,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 3/8 × 3/8 | 4,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 1/2 × 1/2 | 4,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 3/4 × 3/4 | 4,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 1 × 1 | 4,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
NPT Male Inlet Plug | ||||||
416 Stainless Steel | ||||||
| 1/8 | 5,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 1/4 | 5,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 3/8 | 4,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 1/2 | 4,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 3/4 | 4,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
| 1 | 4,000 | -65° to 212° | Polyurethane Rubber | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water | 0000000 | 000000 |
Pressure Test Fittings
Steel
Check pressure without permanently installing a gauge. Fittings have an NPT male connection for installation in your pipe or tank. Wrench-tighten the fitting onto your equipment, then insert the gauge adapter (sold separately) into the fitting. Connect gauge adapters to gauges with 1/4 pipe size NPT male threads.
Plugs | Gauge Adapters | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Thread Size | Thread Pitch, mm | Max. Pressure, psi | Gasket Material | Ht. | For Use With | Each | Each | ||
NPT Male × Metric Male | ||||||||||
Steel | ||||||||||
| 1/8 | M16 | 2 | 5,800 | Fluoroelastomer Rubber | 1 1/2" | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Water | 0000000 | 000000 | 0000000 | 000000 |
| 1/4 | M16 | 2 | 5,800 | Fluoroelastomer Rubber | 1 1/2" | Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Water | 0000000 | 00000 | 0000000 | 00000 |
Gauge Guards
316 Stainless Steel Guard
316 Stainless Steel Guard With Drain Port
Also known as isolators or diaphragm seals, these protect gauges from corrosive process media. Fill guards with hydraulic oil (not included) before use.
316 stainless steel guards provide excellent corrosion and chemical resistance and can handle higher temperatures and pressures than plastic guards.
Guards with drain port allow you to remove process media.
Pipe Connections | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Inlet | Outlet | Gasket Material | For Use With | Min. Pressure, psi | Max. Pressure | Max. Temp., °F | Ht. | Each | |
316 Stainless Steel Body | |||||||||
| 1/4 NPT Female | 1/4 NPT Female | 316 Stainless Steel | Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydraulic Oil, Hydrogen, Liquid Nitrogen, Mineral Oil, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water | 60 | 2,500 psi @ 72° F | 300° | 1 3/4" | 0000000 | 0000000 |
| 1/2 NPT Female | 1/4 NPT Female | 316 Stainless Steel | Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydraulic Oil, Hydrogen, Liquid Nitrogen, Mineral Oil, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water | 60 | 2,500 psi @ 72° F | 300° | 1 3/4" | 0000000 | 000000 |
| 1/2 NPT Female | 1/2 NPT Female | 316 Stainless Steel | Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydraulic Oil, Hydrogen, Liquid Nitrogen, Mineral Oil, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water | 60 | 2,500 psi @ 72° F | 300° | 1 1/2" | 0000000 | 000000 |
316 Stainless Steel Body with 1/4 NPT Female Drain Port | |||||||||
| 1/4 NPT Female | 1/4 NPT Female | 316 Stainless Steel | Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydraulic Oil, Hydrogen, Liquid Nitrogen, Mineral Oil, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water | 60 | 2,500 psi @ 72° F | 300° | 2" | 0000000 | 000000 |
| 1/2 NPT Female | 1/4 NPT Female | 316 Stainless Steel | Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydraulic Oil, Hydrogen, Liquid Nitrogen, Mineral Oil, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water | 60 | 2,500 psi @ 72° F | 300° | 2" | 0000000 | 000000 |
| 1/2 NPT Female | 1/2 NPT Female | 316 Stainless Steel | Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydraulic Oil, Hydrogen, Liquid Nitrogen, Mineral Oil, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water | 60 | 2,500 psi @ 72° F | 300° | 2" | 0000000 | 000000 |