Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HP5673 6 found under Parts Kit Valve Cur by Tactair Fluid Controls Inc. The National Stock Number assigned to this part is 1650007970329, and the Federal Supply Class is 1650 Aircraft Hydraulic Vacuum And De-Icing System Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HP5673 6.