Pal Nut is the most common name used for these stamped sheet metal check-nuts. They work in such a manner that allows them to distort under load and return to their original shape in the threaded area because they are made from a spring-like steel.
Carbon Steel, Mild Steel, Alloy Steel & Stainless Steel.
Metric Size: M06 TO M36
Imperial Size: 1/4” TO 1-1/2”