Shop our full range of cup square and carriage bolts at Duchy Fasteners. Available in zinc plated (BZP), hot dip galvanised, A2 304 stainless steel and A4 316 marine-grade stainless. Cup square bolts feature a domed head and square shank to prevent rotation — ideal for timber connections, agricultural, construction and general engineering applications. Available in metric sizes from M6 to M20 and a wide range of lengths. UK trade supplier with fast delivery from Cornwall.
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