DIN933 refers to a specific standard for hex bolts in Germany. The standard specifies the dimensions, materials, and other characteristics of the bolts. Carbon steel hex bolts that comply with DIN933 are widely used in various industries due to their strength and durability.

In terms of structure, DIN933 carbon steel hex bolts typically consist of the following components:

1. Head: The head of the bolt is hexagonal in shape, providing six flat sides. This design allows for easy gripping and turning using a wrench or a socket.

2. Shank: The shank is the main body of the bolt, which connects the head and the threaded portion. It is usually cylindrical in shape and has a consistent diameter along its length.

3. Threaded portion: This is the section of the bolt that features external threading. The threads allow the bolt to be securely fastened into a corresponding threaded hole or nut.

4. Thread length: The length of the threaded portion can vary depending on the specific application. It determines how deep the bolt can be threaded into a hole or nut.

5. Thread pitch: The thread pitch refers to the distance between adjacent threads on the bolt. It determines how fine or coarse the threads are and affects the bolt's engagement with the mating threads.

6. Finish: Carbon steel hex bolts typically have a plain or black oxide finish. This finish helps protect the bolt from corrosion and provides a smoother surface for easier installation.