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Cup Head Bolts

Cup Head Bolts

Cup Head Bolts – Square Neck Carriage Bolts for Timber, Fencing & Structural Use

Discover our range of cup head square neck bolts, also known as carriage bolts, designed for secure fastening in timber construction, fencing, and general structural applications. These bolts feature a smooth, rounded dome head and a square neck just below the head that locks into timber, preventing the bolt from turning during tightening.

Available in galvanised, stainless steel finishes, our cup head bolts offer excellent corrosion resistance and are suitable for both indoor and outdoor use.

Why Choose Our Cup Head Bolts?

  • Smooth dome head with square neck for anti-rotation in timber

  • Available in galvanised, stainless steel 

  • Sizes range from M6 to M16 (and 1/2” UNC), with multiple lengths

  • Ideal for fencing, decking, pergolas, timber structures, and playgrounds

  • Compliant with Australian standards

  • Bulk quantities available for commercial and trade buyers

  • Matching nuts and washers available

Whether you're securing timber posts, constructing outdoor structures, or installing fencing, our cup head carriage bolts deliver strong, rust-resistant performance that lasts.