Pentagon Head Screws
The five-sided head provides tamper resistance by making these screws difficult to remove without special tools. Install or remove with 5-point sockets (sold separately). Also known as penta-bolts and 5-point screws, they are commonly used on water and gas valves. They are made from 18-8 stainless steel, which has good chemical resistance and may be mildly magnetic. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||
|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing  | Wd. | Ht. | Drive Size | Tensile Strength, psi | Each | |
18-8 Stainless Steel | ||||||||
3/8"-16 | ||||||||
| 3/4" | Fully Threaded | Coarse | 7/8" | 5/16" | 13/16" | 70,000 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 7/8" | 5/16" | 13/16" | 70,000 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | Coarse | 7/8" | 5/16" | 13/16" | 70,000 | 000000000 | 0000 |
| 2" | Fully Threaded | Coarse | 7/8" | 5/16" | 13/16" | 70,000 | 000000000 | 0000 |
| 2 1/4" | Fully Threaded | Coarse | 7/8" | 5/16" | 13/16" | 70,000 | 000000000 | 0000 |
| 2 1/2" | Fully Threaded | Coarse | 7/8" | 5/16" | 13/16" | 70,000 | 000000000 | 0000 |
| 3" | Fully Threaded | Coarse | 7/8" | 5/16" | 13/16" | 70,000 | 000000000 | 0000 |
| 4" | Fully Threaded | Coarse | 7/8" | 5/16" | 13/16" | 70,000 | 000000000 | 0000 |
1/2"-13 | ||||||||
| 1 1/2" | Fully Threaded | Coarse | 7/8" | 5/16" | 13/16" | 70,000 | 000000000 | 0000 |
| 1 3/4" | Fully Threaded | Coarse | 7/8" | 5/16" | 13/16" | 70,000 | 000000000 | 0000 |
| 2" | Fully Threaded | Coarse | 7/8" | 5/16" | 13/16" | 70,000 | 000000000 | 0000 |
| 2 1/2" | Fully Threaded | Coarse | 7/8" | 5/16" | 13/16" | 70,000 | 000000000 | 0000 |
| 3" | Fully Threaded | Coarse | 7/8" | 5/16" | 13/16" | 70,000 | 000000000 | 0000 |
| 4" | Fully Threaded | Coarse | 7/8" | 5/16" | 13/16" | 70,000 | 000000000 | 0000 |
| 4 1/2" | Fully Threaded | Coarse | 7/8" | 5/16" | 13/16" | 70,000 | 000000000 | 0000 |