Rapid Dual offers a torx drive and hex drive for better force transmission.
Ø 8.0 = T40 or 12mm socket
Ø 10.0 = T50 or 15mm socket
Ø 12.0 = T50 or 17mm socket
1 | Head geometry
- Patented cone underneath head for optimum centring when washer are used
- Head rests flat on metal with 90° screw connection
- Better force transmission with hex drive possible
- The commercially available TX drive saves you time-consuming tool change
2 | Friction part
3 | Thread
4 | Tip
- 35° tip for fast bite
- No pre-drilling required
Rapid® Dual are available in 8 x 50 to 12 x 400 mm.
Dual head allows for better force transmission with hex drive possible –
especially for high timber density and impact driver.
screw Ø8mm = 12 mm,
screw Ø10mm = 15 mm,
screw Ø12mm = 17 mm.
The commercially available T-Drive saves a time-consuming tool-change.
screw Ø8mm = T-30,
screw Ø10mm = T-40,
screw Ø12mm = T-40.
The friction part reduces screwing resistance by opening the hole slightly wider than the screw shank. It is usually combined with the half thread.
Friction Part Geometries
Partially threaded screws, also known as half thread, pull timber members or steel plates and timber together. For the design head pull-through and withdrawal of thread must be checked. Lateral loads as well as axial loads are efficient transferred.
The axial load capacity of the thread in comparison to the countersunk head is approx. 3:1. Using a washer head screw leads to a similar performance of the thread pull out and the head pull through capacity.
Applications for partially threaded screws.