Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B 001 21 0474 40 2 found under Slide Drawer Extension by Hettich America Lp. The National Stock Number assigned to this part is 5340012658218, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B 001 21 0474 40 2.