Countersunk hex socket screw according to ANSI B18.3 standard with UNF fine inch thread, in stainless steel A2. The countersunk head allows the screw to sit flush with the surface after installation. UNF fine thread provides more threads per inch, offering increased thread engagement and controlled tightening in assemblies. Stainless steel A2 provides good corrosion resistance for both indoor and outdoor use. Used where flush mounting and stainless material are required. Available in multiple sizes from SWEBOLT & BOTNIA BOLT.