Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number V1E10521 ITEM 19 found under Disc Stack Assembly by Vacco Industries. The National Stock Number assigned to this part is 3040015009039, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like V1E10521 ITEM 19.