Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6-41639-501 found under Axle Landing Gear by Machine Specialties Inc. The National Stock Number assigned to this part is 1620008781621, and the Federal Supply Class is 1620 Aircraft Landing Gear Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 6-41639-501.