DIN 603 is a German standard for carriage bolts.
It specifies round head bolts with a square neck.
The square neck prevents rotation during tightening.
Commonly manufactured in steel and stainless steel.
Available in 8.8 grade high tensile steel.
Used mainly in wood and steel connections.
Provides a smooth, dome-shaped finished head.
Available in various metric sizes and lengths.
Often supplied in zinc plated or plain finish.
Suitable for secure fastening in construction and fabrication.