Stainless steel carriage bolt semi-circular head square neck screw
The carriage bolt has a large round head and a square neck below the head. It is also called a large semi-circular square neck bolt. It is generally used with a nut to fasten and connect two parts with through holes...
The carriage bolt is placed in the groove, and the square neck of the head is embedded in the groove of the connection member, which can prevent the bolt from rotating in the same direction during the installation process and can also move in parallel in the groove.
The carriage bolts are quoted from the German standard DIN 603-1981. The standard specifies the carriage bolts with thread specifications from M5-M20 metric thread and grade C.
The carriage bolts are divided into carbon steel carriage bolts and stainless steel carriage bolts according to the material.
1. Carbon steel carriage bolts have a performance rating of 3.6 and 4.8.
2. Stainless steel carriage bolts have a performance rating of 6.8.