This MF hex nut meets DIN 934 standards and is made of steel with a metric fine thread. It features an electrolytically zinc-plated, black-passivated finish, making it suitable for indoor use or environments with very mild exposure. Please note: Class |8| nuts are rated for strength according to DIN 267-4 and have a lower load capacity than Class 8 nuts rated under ISO 898-2. Mechanical overloading can cause the threads on the nut or bolt to strip.