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About Nuts, Materials, and Finishes
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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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About Thumb Screw and Binding Post Materials
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Metric Low-Strength Steel Cap Nuts
Often referred to as acorn nuts, these nuts have a smooth rounded head that covers and protects threads while providing a finished appearance. About half the strength of medium-strength steel cap nuts, use them in light duty fastening applications, such as securing access panels.
Chrome-plated steel cap nuts have excellent resistance to chemicals and salt water and have a decorative metallic finish.
For technical drawings and 3-D models, click on a part number.
Brass Cap Nuts
These cap nuts are corrosion resistant in wet environments, electrically conductive, and nonmagnetic. Also known as acorn nuts, they have a smooth rounded head that covers and protects threads while providing a finished appearance. All have excellent resistance to chemicals and salt water and have a decorative metallic finish.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||
|---|---|---|---|---|---|---|
| Size | Dp. | Wd. | Ht. | Pkg. Qty. | Pkg. | |
Chrome-Plated Brass | ||||||
| 6-32 | 1/8" | 5/16" | 9/32" | 10 | 000000000 | 00000 |
| 8-32 | 1/8" | 5/16" | 9/32" | 10 | 000000000 | 0000 |
| 10-24 | 5/32" | 3/8" | 11/32" | 10 | 000000000 | 0000 |
| 10-32 | 5/32" | 3/8" | 11/32" | 10 | 000000000 | 0000 |
| 1/4"-20 | 5/32" | 7/16" | 3/8" | 10 | 000000000 | 0000 |
| 1/4"-28 | 7/32" | 7/16" | 3/8" | 10 | 000000000 | 0000 |
| 5/16"-18 | 7/32" | 9/16" | 7/16" | 10 | 000000000 | 0000 |
| 5/16"-24 | 9/32" | 9/16" | 7/16" | 10 | 000000000 | 00000 |
| 3/8"-16 | 1/4" | 5/8" | 1/2" | 5 | 000000000 | 0000 |
| 3/8"-24 | 5/16" | 5/8" | 1/2" | 10 | 000000000 | 00000 |
| 7/16"-20 | 3/8" | 3/4" | 9/16" | 5 | 000000000 | 0000 |
| 1/2"-13 | 5/16" | 3/4" | 9/16" | 5 | 000000000 | 0000 |
| 1/2"-20 | 3/8" | 3/4" | 9/16" | 5 | 000000000 | 00000 |
| 5/8"-11 | 7/16" | 1" | 3/4" | 1 | 000000000 | 0000 |
| 3/4"-10 | 1/2" | 1 1/16" | 7/8" | 1 | 000000000 | 00000 |
| 1"-8 | 5/8" | 1 7/16" | 1 1/4" | 1 | 000000000 | 00000 |
Brass Binding Barrels and Screws for Door Hardware
Brass binding barrels and screws are corrosion resistant in wet environments, electrically conductive, and nonmagnetic. Use them to anchor door closers, kickplates, and other architectural hardware. The barrel head is smooth with no drive to be tampered with on the outside of your door, and the screw has a flat head that sits flush with the surface for a finished look. The screw protrudes from the barrel to leave room for hardware. Install in a hole with a diameter equal to the barrel diameter. Barrel length and screw length are measured from under the head.
For technical drawings and 3-D models, click on a part number.
Barrel | Screw | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Material Thick. | Lg. | Dia. | Head Dia. | Head Ht. | Thread Dp. | Lg. | Head Dia. | Head Ht. | Drive Size | Countersink Angle | Appearance | Each | |
Chrome-Plated Brass | |||||||||||||
8-32 | |||||||||||||
| 1 3/8" | 1 3/16" | 1/4" | 1/2" | 1/8" | 5/8" | 1" | 5/16" | 3/32" | No. 2 | 82° | Polished | 000000000 | 00000 |
| 1 3/4" | 1 9/16" | 1/4" | 1/2" | 1/8" | 5/8" | 1" | 5/16" | 3/32" | No. 2 | 82° | Polished | 000000000 | 0000 |
10-32 | |||||||||||||
| 1 3/8" | 1 3/16" | 5/16" | 1/2" | 1/8" | 3/4" | 1" | 23/64" | 7/64" | No. 2 | 82° | Polished | 000000000 | 0000 |
| 1 3/4" | 1 9/16" | 5/16" | 1/2" | 1/8" | 3/4" | 1" | 23/64" | 7/64" | No. 2 | 82° | Polished | 000000000 | 0000 |
12-24 | |||||||||||||
| 1 3/8" | 1 3/16" | 5/16" | 1/2" | 1/8" | 3/4" | 1" | 13/32" | 1/8" | No. 3 | 82° | Polished | 000000000 | 0000 |
| 1 3/4" | 1 9/16" | 5/16" | 1/2" | 1/8" | 3/4" | 1" | 13/32" | 1/8" | No. 3 | 82° | Polished | 000000000 | 0000 |
1/4"-20 | |||||||||||||
| 1 3/16" | 1" | 3/8" | 9/16" | 5/32" | 5/8" | 1/2" | 31/64" | 5/32" | No. 3 | 82° | Polished | 000000000 | 0000 |
| 1 3/4" | 1 9/16" | 3/8" | 9/16" | 5/32" | 1 1/4" | 1 1/2" | 31/64" | 5/32" | No. 3 | 82° | Polished | 000000000 | 0000 |
| 2 1/4" | 2 1/16" | 3/8" | 9/16" | 5/32" | 1 1/4" | 1 1/2" | 31/64" | 5/32" | No. 3 | 82° | Polished | 000000000 | 0000 |
| 3 3/16" | 3" | 3/8" | 9/16" | 5/32" | 3/4" | 1 1/2" | 31/64" | 5/32" | No. 3 | 82° | Polished | 000000000 | 00000 |
5/16"-18 | |||||||||||||
| 2 1/4" | 2 1/16" | 1/2" | 3/4" | 3/16" | 1 1/4" | 1 1/2" | 19/32" | 3/16" | No. 4 | 82° | Polished | 000000000 | 0000 |
| 3 3/16" | 3" | 1/2" | 3/4" | 3/16" | 3/4" | 1 1/2" | 19/32" | 3/16" | No. 4 | 82° | Polished | 000000000 | 00000 |
Low-Pressure Chrome-Plated Brass Threaded Pipe Fittings
The polished chrome plating not only has a shiny appearance, but also improves corrosion resistance. Also known as Class 125 fittings, these are for use in low-pressure pipe lines.
Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Class: 125
- Specifications Met: ASTM B456
- Pipe Nipples and Pipe: Use Schedule 40 brass
| Pipe Size | Max. Pressure | Max. Steam Pressure | Each | |
NPT Female | ||||
|---|---|---|---|---|
| 1/8 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
| 1/4 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 0000 |
| 3/8 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 0000 |
| 1/2 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
| 3/4 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
| 1 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
Nuts for High-Pressure Nipples for Compressed Gas
Slide a high-pressure hose nipple for compressed gas into one of these nuts to connect a pipe to the inlet of a pressure regulator. They are also known as CGA (Compressed Gas Association) nuts and inlet nuts.
Brass nuts have good corrosion resistance and are softer than 316 stainless steel nuts, so they're easier to thread together. Chrome-plated brass nuts have comparable corrosion and wear resistance to aluminum-plated brass nuts, and have a bright, shiny appearance.
Nuts with left-hand threads are identified with a notch.
Note: Nuts have a CGA, BS, or DIN number that corresponds to a specific type of gas. Choose a nut with the same number as your tank and other system components.
- Maximum Pressure: See table
- Maximum Temperature: 120° F
| Number | Thread Size | Thread Type | Thread Direction | Max. Pressure | For Use With | Each | |
Chrome-Plated Brass | |||||||
|---|---|---|---|---|---|---|---|
| CGA 320 | 0.830"-14 | NGO | Right Hand | 3,000 psi @ 72° F | Carbon Dioxide | 000000000 | 00000 |
| CGA 350 | 0.830"-14 | NGO | Left Hand | 3,000 psi @ 72° F | Carbon Monoxide, Ethane, Ethylene, Hydrogen, Methane, Methyl Fluoride, Natural Gas | 000000000 | 00000 |
| CGA 540 | 0.908"-14 | NGO | Right Hand | 3,000 psi @ 72° F | Oxygen | 000000000 | 0000 |
- Maximum Pressure: See table
- Maximum Temperature: 120° F
| Number | Thread Size | Thread Type | Thread Direction | Max. Pressure | For Use With | Each | |
Chrome-Plated Brass | |||||||
|---|---|---|---|---|---|---|---|
| CGA 510 | 0.880"-14 | NGO | Left Hand | 500 psi @ 72° F | Acetylene, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Isobutane, Methane, Methyl Chloride, Natural Gas, Propane, Propylene, Vinyl Bromide, Vinyl Chloride | 000000000 | 000000 |
| CGA 580 | 0.960"-14 | NGO | Right Hand | 3,000 psi @ 72° F | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 000000000 | 0000 |
| CGA 590 | 0.960"-14 | NGO | Left Hand | 3,000 psi @ 72° F | Sulfur Hexafluoride | 000000000 | 00000 |
Slip-Joint Fittings
Use these fittings to connect tailpieces, P-traps, S-traps, and extension tubing to sink drains.