Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AN919-23S found under Reducer Boss by Allan Aircraft Supply Co Llc. The National Stock Number assigned to this part is 4730000546266, and the Federal Supply Class is 4730 Hose Pipe Tube Lubrication And Railing Fittings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AN919-23S.