Din603 4.8-8.8 Full Thread Carriage Bolt ANSI/ASME B18.5 standard

According to the head size, it is divided into large semi-round head wagon screw (corresponding to standard GB/T14 and DIN603) and small semi-round head wagon screw (corresponding to standard GB/ t12-85).
Carriage bolts, a class of fasteners consisting of head and screw (cylindrical body with external thread), shall be fitted with nuts for fastening two parts with through-hole.
Carriage bolt refers to when the round head square neck bolts, English for carriage bolt but in general, the bolts used to connect two objects, usually by light hole, need and nut (the nut), can't afford to a single connection. A wrench is usually used for tools. The head is mostly hexagon first class, generally larger. Usually don't need a nut screw, directly to match the two objects (generally fittings to drilling, tapping screw thread), tools generally with screwdriver, screwdriver, head of slotted, cross slot, inside and outside hexagon is very much also, generally small.