Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 28400767 found under Wiper Piston by Dutch Valley Supply Co. The National Stock Number assigned to this part is 1650014800635, 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 28400767.