They are called “countersunk screws” because they “sink” into objects and surfaces.
ISO Metric Countersunk Screws Sizes DimensionsĪlso known as a flat-heat screw, a countersunk screw is a type of screw that’s designed to rest flush with the object or surface in which it’s inserted.Countersunk Screws Vs Non Countersunk Screws.Bronze Fasteners-Bronze Screws And Bolts.Titanium Fasteners-Titanium Screws And Bolts.Carbon steel Fasteners-Carbon steel Screws And Bolts.Stainless steel Fasteners-Stainless steel Screws And Bolts.Aluminum Fasteners-Aluminum Screws And Bolts.