Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CP-540 found under Cap Valve Gas Cylinder Outlet by Western Enterprises. The National Stock Number assigned to this part is 8120002166799, and the Federal Supply Class is 8120 Commercial And Industrial Gas Cylinders. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like CP-540.