Hexagon bolts & setscrews - BA, BSW, UNC and UNF
Up to 1 1/2” will normally be supplied fully threaded (setscrews), above that are usually bolts (with a shank).
Most have polished/unlettered heads.
Note: All BSF are special manufacture in grade 316 material.
This page lists the BA, BSW, UNC and UNF variations.