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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Acid-Resistant Yor-Lok Fittings for Nickel Alloy Tubing
- For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydrofluoric Acid, Mineral Oil, Salt Water, Steam, Sulfuric Acid, Water
- Temperature Range: -325° to 900° F
- Tubing: Use with seamless soft 400 nickel
- Specifications Met: See table
Made of 400 nickel, these Monel fittings have the corrosion resistance to handle hydrofluoric and sulfuric acid. Also known as instrumentation fittings, they are made to tight tolerances for use in high-precision applications. They include a nut with two sleeves (ferrules). The sleeves bite into tubing as you tighten the nut, creating a strong, leak-tight seal. They are compatible with Swagelok®, Let-Lok, and A-Lok fittings.
For Tube | |||||||
|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | Pipe Size  | Material | Max. Pressure | Specifications Met | Each | |
NPT Threads | |||||||
| 1/4" | 0.035" | 1/4 | 400 Nickel | 4,800 psi @ 72° F | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM B564 | 00000000 | 000000 |
| 3/8" | 0.035" | 1/4 | 400 Nickel | 3,100 psi @ 72° F | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM B564 | 00000000 | 00000 |
| 3/8" | 0.035" | 3/8 | 400 Nickel | 3,100 psi @ 72° F | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM B564 | 00000000 | 000000 |
| 1/2" | 0.035" | 1/2 | 400 Nickel | 2,300 psi @ 72° F | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM B564 | 00000000 | 000000 |
Compression Fittings for Plastic Tubing—Chemicals
- For Use With: PFA Plastic: Hydrochloric Acid, Sulfuric Acid
PTFE Plastic: Alcohol, Ammonia, Benzoic Acid, Bleach, Bromine, Coolant, Fluoboric Acid, Hydrochloric Acid, Hydrofluoric Acid, Nitric Acid, Organic Solvents, Sodium Carbonate, Sulfuric Acid - Temperature Range: PFA Plastic: 0° to 350° F
PTFE Plastic: -40° to 185° F - Tubing: PFA Plastic: Use with hard (Durometer 50D-65D) PFA or PTFE plastic
PTFE Plastic: Use with hard (Durometer 60D) PFA or PTFE plastic
A sleeve (ferrule) compresses the tubing as you tighten the nut, creating a strong seal. The nut and sleeve are included. Fittings are also known as flareless fittings. Fittings that include a gripper sleeve on the tubing create an even tighter seal.
PTFE fittings are highly resistant to most acids, alcohols, detergents, and solvents. They’re made by machining. Their nut is made of PVDF, which is resistant to halogens such as chlorine and bromine, strong acids such as hydrofluoric and nitric acids, and organic solvents.
