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About Hex Head Screws and Bolts
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Vented Hex Head Screws
Fully Threaded
Partially Threaded
Drilled through the head and shaft, these screws vent fluid and gases trapped below the screw, making them good for vacuum applications. Screws are 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 | Min. Thread Lg. | Thread Spacing  | Wd. | Ht. | Vent Dia. | Tensile Strength, psi | Each | |
18-8 Stainless Steel | |||||||||
1/4"-20 | |||||||||
| 1/2" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 0.062" | 70,000 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 0.062" | 70,000 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 0.062" | 70,000 | 000000000 | 0000 |
5/16"-18 | |||||||||
| 3/4" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 0.078" | 70,000 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 0.078" | 70,000 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 7/8" | Coarse | 1/2" | 13/64" | 0.078" | 70,000 | 000000000 | 0000 |
3/8"-16 | |||||||||
| 3/4" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 0.093" | 70,000 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 0.093" | 70,000 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1" | Coarse | 9/16" | 15/64" | 0.093" | 70,000 | 000000000 | 00000 |
1/2"-13 | |||||||||
| 1" | Fully Threaded | __ | Coarse | 3/4" | 5/16" | 1/8" | 70,000 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | __ | Coarse | 3/4" | 5/16" | 1/8" | 70,000 | 000000000 | 00000 |
| 2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 1/8" | 70,000 | 000000000 | 00000 |