Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 17MK9B1 found under Operating Mechanism by General Electric Inc. The National Stock Number assigned to this part is 2240003106623, and the Federal Supply Class is 2240 Locomotive And Rail Car Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 17MK9B1.