Ordering by number: this is 9A, the Chicago Pneumatic CP9 A taper adaptor. It makes the air or hydraulic connection to the tool. Thread and sealing-face condition here is the difference between full pressure at the tool and a slow leak nobody notices.

If you are working from a machine rather than a part number, start at the parts diagram library, or send us the model and serial and we will match it. Machines themselves are on the Chicago Pneumatic tool range. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.

• Part number: 9A
• Manufacturer: Chicago Pneumatic
• Crowder SKU: CP-9A