Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7520-01-483-8901 found under Trimmer Paper Drop by National Industries For The Blind. The National Stock Number assigned to this part is 7520014838901, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 7520-01-483-8901.