About Hex Head Screws and Bolts
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Vented Hex Head Screws
![](/prerenderstable/mvPRE/contents/gfx/imagecache/902/90220a190p2-b01-digital@halfx_637026994766430793.png?ver=imagenotfound)
Fully Threaded
![](/prerenderstable/mvPRE/contents/gfx/imagecache/902/90220a190p1-b01-digital@halfx_637026959798509764.png?ver=imagenotfound)
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 | 00000 |
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 | 00000 |
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 |