# Category: Galling - [OKS-250 anti-galling paste](https://menet-trend.hu/en/nonox-world/oks-250-anti-galling-paste.md) — Galling is not a material defect and not corrosion – but with stainless threads it can happen on the very first tightening. What causes it, how to prevent it with heterogeneous A2/A4 pairings, slower tightening and clean threads, and what OKS 250 anti-galling paste does. Plus our anti-galling warranty. - [Galling of stainless screws](https://menet-trend.hu/en/nonox-world/galling-of-stainless-screws.md) — NOT a material defect! NOT caused by corrosion! NOT a common phenomenon, but it can happen. With austenitic screws the thread can seize as if welded, already during the first tightening. What causes galling, and which methods reliably prevent it? - [How to avoid galling of stainless steel fasteners](https://menet-trend.hu/en/nonox-world/how-to-avoid-galling-of-stainless-steel-fasteners.md) — With NONOX stainless steel screw joints, galling of rough surfaces can still cause problems even today. It is not uncommon for the phenomenon to be assumed to be caused by corrosion; in contrast, other triggering causes usually lie in the background, such as coarse thread machining or other surface damage. - [20 points to follow to prevent galling of austenitic (stainless and acid-resistant) screws](https://menet-trend.hu/en/nonox-world/20-points-to-follow-to-prevent-galling-of-austenitic-stainless-and-acid-resistant-screws.md) — Galling of stainless and acid-resistant screws is not caused by a material defect, but by mechanical irregularities and/or failure to follow the assembly technology. You can find out here, point by point, what that technology is: handle the screws carefully, and avoid every possibility of mechanical damage to them. --- HTML: