Not sure what you're asking here. Are you saying you don't know how to design what you need? Or you don't know where to find it? It looks like its already designed, so I'm not sure what it is you're trying to "approach" here. More detail please.
The picture looks like it could be a retaining ring type clevis pin. If so, they are available as assemblies in several different locations (McMaster-Carr, Misumi, Reid Tool, and several others).
start with the size, then the material once you determine the static, dynamic, thermal and vibration loads, make sure it can survive the conditions - temperature, exposure to chemicals, etc, review the specifications for the device, understand the expected life, etc?
Sorry for such a vague post without any more information.
So I have attached an image with the information. For me, I am given the task to decide the material for the PIN A and PIN B as shown in the picture.
Pin A - 1" Dia X 6" L
Pin B - 1" Dia X 5-5/8" L
These Pins are Cylinder Pins which hold the cylinder to the weldment. So i need to decide based on the the information provided and I dont know how to start
