Hexagon bolts are defined as partially threaded, whereas hexagon setscrews are fully threaded. Bolts (partially threaded) Metric Hexagon Bolts Zinc Plated Metric Hexagon Bolts Stainless Steel BSW (Whitworth) Hexagon Bolts Self Colour BSW (Whitworth) Hexagon Bolts Zinc Plated BSF Hexagon Bolts Self Colour UNC Hexagon Bolts Self Colour UNF Hexagon Bolts Self Colour Setscrews (fully threaded) Metric Hexagon Setscrews Zinc Plated Metric Hexagon Setscrews Stainless Steel BSW (Whitworth) Hexagon Setscrews Self Colour BSF Hexagon Setscrews Self Colour UNC Hexagon Setscrews Self Colour UNF Hexagon Setscrews Self Colour