DIN 608 Carriage Bolt

The Russian equivalent of the German standard DIN 608 is GOST 7786-81, which sets out the technical requirements for carriage bolts with a countersunk head and a square-section collar of low height. Carbon and stainless steel alloys, as well as brass, are used to manufacture the fasteners. Versions made of non-ferrous metals and high-strength plastic are also available.

Galvanic zinc plating is used as corrosion protection for plain steel. The standard specifies the following characteristics:

• two sizes – M10, M12;
• product grade C;
• tolerance class – 8g;
• the working shank of the product carries a metric thread that transitions smoothly into the collar;
• the head is smooth, with no slots or recesses.

The square collar prevents the screw from rotating during tightening. The fastening joint is formed by connecting two elements: the DIN 608 bolt and the DIN 555 nut. For added strength, a flat washer can be placed under the nut.

Scope of application

This type of fastener is used where it is impossible to install a screw with a regular hexagon head, or where an inconspicuous joint is required. It is called a carriage bolt because the furniture industry is its largest consumer.

The DIN 608 bolt is also used by machine builders and equipment assemblers, DIY enthusiasts and professional builders. It is used for mounting attachments on agricultural machinery, where it is known as a plowshare bolt.

FLOK supplies DIN 608 carriage bolts.