Shop our full range of metric and imperial hex bolts and hex set screws at Duchy Fasteners. Available in zinc plated (BZP), self colour 8.8 high tensile, hot dip galvanised, A2 304 stainless steel and A4 316 marine-grade stainless. Hex bolts feature a partial thread; set screws are fully threaded. Available in metric sizes M4 to M36 and a wide range of imperial sizes. UK trade supplier with fast delivery from Cornwall.