SFS Bohrschrauben Irius A2 SX5/18-L12-S19-5,5x41 KL18

During installation using the irius system, the fastener is securely clamped in the installation tool, preventing it from becoming loose. This prevents lateral buckling. The unique under-head drive is an innovative solution that offers optimum installation reliability whilst meeting the highest aesthetic standards. The E420 installation tool is required to install fasteners using the irius system.

Stainless steel refers to alloyed or unalloyed steels that contain at least 10.5% chromium and less than 1.2% carbon. Colloquially, stainless steel is also referred to as stainless steel (NiRo), although not all stainless steel is the same as "stainless".

Stainless steels are defined in DIN EN 10088-1 as iron alloys containing at least 10.5 per cent chromium and no more than 1.2 per cent carbon. The multi-part DIN EN ISO 3506 series of standards applies to mechanical fasteners made from stainless steels. Grade A2 is classified as non-acid-resistant. Austenitic stainless steels cannot be heat-treated and achieve their different strength classes through cold working to varying degrees.