* Body bolts: These hold the body panels together. Different sizes and types would be used depending on the location and application (e.g., sheet metal to sheet metal, sheet metal to frame).
* Engine bolts: These secure the engine to the engine mounts.
* Suspension bolts: These connect the suspension components (control arms, struts, etc.) to the chassis.
* Interior bolts: These hold interior trim pieces, seats, and other components in place.
To know what type of bolt is needed, you'd need to specify the exact location on the PT Cruiser where the join is required. For example, "bolt join for the left front fender" would be a much more specific and useful question. You would then need a parts diagram or a repair manual to identify the correct bolt size and type.