News & insight
Why are flat point (FL) and dog point (SD/LD) not included in ISO 4753 end-form customisation?
15 May 2026
FL is intended for screws that bear against a surface, and SD/LD are intended for screws that locate into holes or slots. Neither supports reliable nut engagement on a stud.
These forms can look similar to CH, PF and PC. Because of this, we prefer to discuss your requirements before quoting to ensure the correct end-form for your application.