Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PF-16 found under Valve Pneumatic Tank by B And B Tritech Inc. The National Stock Number assigned to this part is 4820013084321, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PF-16.