Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 645-0090-1 found under Latch Set Mortise by B E Aerospace Inc. The National Stock Number assigned to this part is 5340012994946, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 645-0090-1.