Carriage bolts feature a smooth rounded head and a square neck that embeds into a pre‑punched square hole, providing self‑locking against rotation during installation without additional tools. The neat head profile makes them ideal for wood structures, metal‑to‑wood connections, and outdoor applications.
Customizable options:

Materials: Low carbon steel (e.g., C1008), medium carbon steel (e.g., C1045), stainless steel (SS304/SS316), brass, etc.

Surface finishes: Electroplated blue/white zinc, yellow zinc, black zinc; hot‑dip galvanizing; Dacromet; mechanical zinc plating; black oxide; phosphating; eco‑friendly nickel plating, etc.

Other variables: Nominal diameter (M6–M12), length (20mm–100mm), square neck dimensions, and thread length can be manufactured to customer drawings.
Typical applications include wood decking, outdoor furniture, agricultural machinery assembly, and concrete formwork.