Hex socket cap screw according to ANSI B18.3 standard with UNC and UNF inch threads in acid-resistant stainless steel A4 (AISI 316 / A4-80). A4 stainless steel contains molybdenum, providing excellent corrosion resistance in marine, chemical, and outdoor environments. Inch-threaded screws are used in imported machinery, process installations, and equipment following UNC or UNF standards. The internal hex drive allows secure installation even in confined spaces. Available in multiple dimensions and lengths from SWEBOLT & BOTNIA BOLT.