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Vented Socket Countersunk Head Machine Screws, created to DIN 7991 specification, have a hexagonal recess and are driven using a hex wrench or insert bit – making the screws more efficient than the slotted screw products, due to the hex socket drive having more resistance to cam out. They can also be used with power drivers, enabling faster use and higher achievable torque.
The vent in this screw would be to let air voids left from the fastener being threaded into a hole escape, avoiding a virtual leak.
Available from Fastenright in Steel grade 10.9, A2 and A4 Stainless Steel, Brass, Aluminium and Titanium.
Thread diameters from M3 to M30, with lengths ranging from 4mm to 100mm onwards.
Non-standard sizes and materials are available to order, including custom parts made to drawings.
d3 dimension can be to customer specification.
| Metric Technical Information & Available Sizes | |||||||||||||||
| Thread Diameter |
M3 | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 |
| d2 (mm) | 6 |
8 |
10 |
12 |
16 |
20 | 24 |
27 |
30 |
33 |
36 | 36 |
CALL |
CALL |
CALL |
| d3 (mm) | 1.2 | 1.5 |
1.5 |
2 | 2 | 3 |
3 |
3 | 3 |
CALL |
CALL |
CALL |
CALL |
CALL |
CALL |
| K (mm) | 1.7 | 2.3 | 2.8 |
3.3 | 4.4 | 5.5 |
6.5 |
7 |
7.5 |
8 |
13.1 | 14 | CALL |
CALL |
CALL |
| S (mm) | 2 | 2.5 | 3 |
4 | 5 | 6 |
8 |
10 |
10 |
10 |
14 | 14 | CALL |
CALL |
CALL |
| Available Sizes | M3 | M4 | M5 | M4 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 |
| 4mm |  |
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| 18mm | |
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| 22mm | |
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| 25mm | |
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| 30mm | |
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| 35mm | |
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| 40mm | |
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| 45mm | |
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| 50mm | |
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| 55mm | |
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| 60mm | |
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| 65mm | |
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| 70mm | |
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| 75mm | |
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| 80mm | |
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| 85mm | |
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| 90mm | |
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| 95mm | |
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| 100mm | |
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| > 100mm | |
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| = Available Size not listed? Please call to discuss – we may be able to provide it. |
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