Carriage Bolts DIN603

DIN603 carriage bolt, also called coach bolt, follows DIN603 standard with round dome head and square neck.

Materials: Carbon steel Grade 4.8, 304/316 stainless steel; surface finishes include zinc plating and passivation.

Features: Square neck locks the bolt to avoid rotation during tightening; smooth round head won’t scratch surfaces; complete metric sizes M4-M16, custom lengths available.

Selling Points: No extra positioning fixtures needed; anti-rust coating for long service life; in-stock standard sizes, low MOQ, OEM customization supported, factory wholesale price.

Applications: Widely used for wooden furniture, fences, guardrails, agricultural machinery and outdoor timber construction fastening.