SFS Fassadenschrauben T20 1.4567 TW-S-D16-4,8x40

The Torx drive is standardised in accordance with ISO 10664. The TORX PLUS® is a further development of the tried-and-tested TORX® drive system. The TORX PLUS® drive system is also available with the AUTOSERT® function. The AUTOSERT® consists of composite angular guide ramps. These allow a bit rotating at high speeds to engage with the recess.

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.