Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 64004-20-M20318 found under Torsionmeter Husk by Mcnab Incorporated. The National Stock Number assigned to this part is 2990012875089, and the Federal Supply Class is 2990 Miscellaneous Engine Accessories Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 64004-20-M20318.