Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PF-15 found under Valve Regulating Fluid Pressure by B And B Tritech Inc. The National Stock Number assigned to this part is 4820012891622, 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-15.