The manufacturing details of regular cut denim pants can vary depending on the specific brand or manufacturer. However, here are some general steps that are involved in the manufacturing process:

1. Design: The first step in manufacturing regular cut denim pants is designing the pattern for the pants. This includes deciding on the style, fit, and measurements of the pants.
2. Fabric selection: The fabric used for denim pants is typically a heavy cotton twill material. The fabric is selected based on its quality, weight, and color.
3. Cutting: After the fabric is selected, the fabric is cut into the pattern for the pants. This is typically done with large cutting machines.
4. Sewing: Once the fabric is cut, the pieces are sewn together to create the pants. This includes sewing the front and back panels together, as well as attaching the waistband, pockets, and zipper.
5. Finishing: After the pants are sewn together, they are inspected for quality and any loose threads or other imperfections are trimmed. The pants are then washed and dried to soften the fabric and give the pants a worn-in look.
6. Final inspection: The final step in the manufacturing process is a final inspection of the pants to ensure that they meet the quality standards of the manufacturer. The pants are checked for fit, color consistency, and any defects.
7. Packaging and distribution: The finished pants are then packaged and shipped to retailers for sale to consumers.

Overall, the manufacturing of regular cut denim pants involves a number of steps, including designing the pattern, selecting the fabric, cutting the fabric, sewing the pieces together, finishing the pants, and conducting a final inspection before packaging and distribution.