This part is an OEM from Campbell Hausfeld for use with Air Compressors. The check valve lets pressurized airflow into the tank and prevents air from flowing back into the pump. The most common reason for replacing the check valve is if it is stuck open. This part is sold individually. The tools that you will need to replace the check valve is an adjustable wrench and a 7/16 wrench.
This is sold as a set that contains eight washers. These parts attach to the tank and are made out of metal. They are genuine items that are supplied by the original equipment manufacturer for use with Craftsman air compressors. During replacement, it may require a wrench to help install these parts correctly. They will require replacing if they become bent or broken.
These screws are original replacement parts from Craftsman, and are used with air compressors, drills, grinders, jointers, paint sprayers, lathes, sanders, snowthrowers, lawnmowers, miter saws, band saws, and vises. The metal screws are used with different types of equipment and the application of the screws can vary based on the model of the machine. The screws are sold in a pack of two.