The packaging includes:M8-1.25 flange hex nut x 25 piecesThe About serrated flange hex nut
flange nut has a washer shaped base that can distribute pressure over a
larger surface area and ensure that the fastener remains
tight. They have serrations that can grip the surface
of the material instead of threads, making them easy to
install and mildly vibration resistant. They are
typically used on assembly lines to speed up operations by
using a single fastener instead of nuts and washers.
High quality 328 stainless steel has perfect strength and
good corrosion resistance in harsh environments such as
high temperature, cold weather, and high humidity,
without the need for time-consuming and expensive maintenance."