Allgrip Cup Square Hex Bolts in A2 stainless steel, available in M8, M10 and M12 diameters across a range of lengths, each supplied in a barcoded Allgrip retail prepack.
Cup square bolts have a smooth domed head with a square shoulder that bites into timber as the nut is tightened, so the bolt cannot spin and no spanner is needed on the head side. A2 stainless steel resists rust and staining indoors and out, making it the right choice for gates, fencing, decking frames, sleepers and outdoor timber structures where a zinc plated bolt would corrode or mark the timber.
Pre-drill a clearance hole through both timbers, insert the bolt and tighten from the nut side with a spanner or socket. Select the size below.