Pins are a simple part that's usually cylindrical and without threading. Different types of pins are used in different capacities.
      -   Dowel Pins: These are solid, cylindrical rods that are used to align or join two parts together with tight tolerances.
 
 
-   Taper Pins: Tapered along their length, these pins are used to provide a secure fit between parts. 
 
 
-   Clevis Pins: Typically used in conjunction with a clevis, these pins are part of a fastening system that can pivot within the clevis. 
 
 
-   Detent Pins: These pins have a feature (like a knob or ring) at one end and a locking mechanism on the other. 
 
 
-   Hitch Pins: Often used in agricultural settings, hitch pins secure implements to a tractor or other vehicles.