Carriage bolts are the traditional timber connection fastener, featuring a smooth dome-shaped head and a square section below the head that locks into the timber to prevent rotation during tightening. JLHY's carriage bolts are hot-dip galvanised for superior corrosion resistance in outdoor and ground-contact applications, making them the reliable choice for deck construction, pergola building, and outdoor timber structures.

The square neck bites into the timber as the nut is tightened, eliminating the need for a second wrench to hold the bolt stationary. This one-wrench installation makes carriage bolts significantly faster to install than standard hex bolts in timber applications, particularly in awkward positions where access for two wrenches is limited.

JLHY's HDG carriage bolts provide both barrier protection and sacrificial cathodic protection from the zinc coating. The round head provides a smooth, snag-free surface safe for applications where people may brush against the fastener. Standard metric sizes from M6 to M24 and lengths from 30mm to 300mm. Contact us for specifications and bulk pricing.