Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 621111017 found under Turret Upper by Strippit Inc. The National Stock Number assigned to this part is 3443012133046, and the Federal Supply Class is 3443 Mechanical Presses Power Driven. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 621111017.