Hexagon bolts are defined as partially threaded, whereas hexagon setscrews are fully threaded.Bolts (partially threaded)Metric Hexagon Bolts Zinc PlatedMetric Hexagon Bolts Stainless SteelBSW (Whitworth) Hexagon Bolts Self ColourBSW (Whitworth) Hexagon Bolts Zinc PlatedBSF Hexagon Bolts Self ColourUNC Hexagon Bolts Self ColourUNF Hexagon Bolts Self ColourSetscrews (fully threaded)Metric Hexagon Setscrews Zinc PlatedMetric Hexagon Setscrews Stainless SteelBSW (Whitworth) Hexagon Setscrews Self ColourBSF Hexagon Setscrews Self ColourUNC Hexagon Setscrews Self ColourUNF Hexagon Setscrews Self Colour