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About Socket Head Screws
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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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Aluminum Socket Head Screws
Fully Threaded
Partially Threaded
Aluminum screws are one-third the weight of steel and have good corrosion resistance. Length is measured from under the head.
Screws with a blue-anodized finish are easy to distinguish.
Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.
Head | Blue-Anodized 7075 Aluminum | |||||||
|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing | Dia. | Ht. | Drive Size | Pkg. Qty. | Pkg. | |
2-56 | ||||||||
| 1/8" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 000000 |
| 3/16" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 00000 |
| 1/4" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 00000 |
4-40 | ||||||||
| 3/16" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 1/4" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 5/16" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 5/8" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 5 | 000000000 | 00000 |
6-32 | ||||||||
| 1/4" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 5/8" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
M4 | ||||||||
| 8mm | Fully Threaded | Coarse | 7.22mm | 4mm | 3 mm | 5 | 000000000 | 0000 |
| 10mm | Fully Threaded | Coarse | 7.22mm | 4mm | 3 mm | 5 | 000000000 | 0000 |
| 12mm | Fully Threaded | Coarse | 7.22mm | 4mm | 3 mm | 5 | 000000000 | 0000 |
Head | Blue-Anodized 2024 Aluminum | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Pkg. Qty. | Pkg. | |
8-32 | |||||||||
| 1/4" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 5 | 000000000 | 000000 |
| 3/8" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 5 | 000000000 | 00000 |
| 5/8" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 10 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 1 | 000000000 | 0000 |
10-32 | |||||||||
| 1/4" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 10 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 10 | 000000000 | 00000 |
1/4"-20 | |||||||||
| 3/8" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 10 | 000000000 | 00000 |
| 5/8" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 5 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1" | Coarse | 3/8" | 1/4" | 3/16" | 1 | 000000000 | 0000 |
Nuts for 37° Flared Fittings for Aluminum Tubing
- For Use With: Air, Coolant, Gasoline, Hydraulic Fluid, Water
- Temperature Range: -60° to 350° F
- Tubing: Use with seamless aluminum
Use these nuts with a sleeve and fitting to provide a tight metal-to-metal seal on aluminum tubing that is flared to 37°. Nuts are aluminum, which is lightweight with good corrosion resistance.
| For Tube OD | Nut Material | Max. Pressure | Each | |
| 3/16" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 00000 |
| 1/4" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 3/8" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 1/2" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 5/8" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 3/4" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 1" | Anodized 2024 Aluminum | 1,500 psi @ 72° F | 0000000 | 00000 |
| 1 1/4" | Anodized 2024 Aluminum | 1,500 psi @ 72° F | 0000000 | 00000 |
Locking Tag Rings
D
These rings have a lock for added security.
Styles B, C, and D have a threaded lock. Unscrew to open; screw to close.
| Style | Material | Lg. | Wd. | Wire Dia. | Color | Pkg. Qty. | Pkg. | |
| D | Anodized Aluminum | 2" | 1" | 0.13" | Blue | 10 | 0000000 | 000000 |