Achieving a larger flange and head diameter were clearly the least problematic issues; likewise, the project team soon managed to create the required asymmetric threading, visible to the naked eye, by working closely with manufacturing colleagues. The real challenge lay in the micro-metre adjustments required. Nevertheless, these creative minds managed to achieve a massive 50% increase over the previous tear-out performance. The thread geometry of an individual SXC5 could be adjusted to offer the customer two savings: either reducing the number of fastener positions and/or optimising the thickness of the substructure. Both options translate into considerable savings for the customer.