Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S450XXLXBZXX found under Latch Assembly Step by A L Hansen Manufacturing Company. The National Stock Number assigned to this part is 5342012651129, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S450XXLXBZXX.