This low-profile MF hex nut is a thin jam nut with left-hand threading, made from plain steel with no coating or surface treatment. The nut is manufactured to DIN 439-2 and ISO 8675 standards and features a property class of 04, meaning it has a reduced load capacity. It comes with a metric fine thread and a left-hand (LH) thread direction. While plain steel is strong, it offers little corrosion resistance on its own.