Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 02-3880-99 found under Sleeve Directional Control Linea by Wilden Pump And Engineering Co. The National Stock Number assigned to this part is 4810014885645, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 02-3880-99.