Series CFL self-clinching flush nuts are engineered to provide permanent load-bearing internal threads in thin ductile sheet materials while maintaining a flush installed profile. Designed for materials with Rockwell hardness of B-70 or less, the clinching feature enables high push-out and torque-out performance without welding or secondary tapping operations. All dimensions conform to industry standards, with internal threads manufactured to ANSI B1.1 and ANSI/ASME B1.13M specifications. Available in passivated 300 series stainless steel, CFL nuts are suited for precision sheet metal assemblies requiring clean external surfaces and reliable mechanical fastening.