Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5-87123 found under Head Linear Actuating Cylinder by Downey Manufacturing Inc. The National Stock Number assigned to this part is 1650003270628, 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 5-87123.