DIN 933 (Hexagonal Full Thread Bolt)
Definition: DIN 933 is a hexagonal head full thread bolt, also called a full thread hexagon bolt. It has threads from the head to the bolt tail and can be fastened to the connected parts by a nut.
Application: This bolt is suitable for applications requiring full thread, often used to connect longer components, suitable for withstanding greater torque and load.
DIN 931 (Hexagon Half-Thread Bolt)
Definition: DIN 931 is a hexagon head half-thread bolt, where the threaded portion of the bolt only covers a portion of the length. Usually only the bottom of the bolt is threaded, and the upper part of the bolt is usually smooth.
Use: This bolt is used in some applications that require a threaded and smooth section. It provides better tensile resistance under higher loads, but is not suitable for applications that require a full thread.
Application scenarios: DIN 933 is suitable for longer connections and larger loads, DIN 931 is used in applications where a smooth section of rod is required.