Galvanized hexagonal nut with collar and M8 thread. A serrated non-slip collar provides more secure fixing. The nut is metric. Technical data Collar diameter: 17mm Height: 8mm Thread: M8 Weight: ∼7g https://elecena.pl/product/22621802/m8-hexagonal-nut-with-collar-galvanized-metric-10-pcs 2023-02-23 https://elecena.pl/product/22621802/m8-hexagonal-nut-with-collar-galvanized-metric-10-pcs 2025-10-29