In the event of failure high costs may be incurred if you do not use the correct screws and fixings. However, in terms of value fastener costs are insignificant (approx 1- 2% of total costs).

If the incorrect screws and fixings or incorrect installation procedures are followed the risks involved are:

• Pull over failure

• Lap failure

• Pull out failure

• Back out resistance

The Decisive Factors are:

• Correct choice

• Good quality

• Durable function of the screws and fixings

• Correct installation