Toothed discs internally toothed DIN 6797 form J-stainless A-1.4310 2,5

The material 1.4310 is an austenitic chrome-nickel steel with good formability. Due to its special mechanical properties, this material is the classic representative of stainless spring steels and is mainly used in the production of corrosion-resistant spring components. The material designation is X10CrNi18-8, X12CrNi177.

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".

The term plain indicates a completely untreated, merely oiled, smooth surface for all DIN and ISO screws such as wood screws, hexagon head screws, threaded rods, nuts and many types of washers.

A1: This grade of steel is specifically intended for machining. Owing to their high sulphur content, steels of this grade have lower corrosion resistance than equivalent steels with a normal sulphur content.