Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DR499B found under Knife by Hickok Incorporated. The National Stock Number assigned to this part is 3610000121322, and the Federal Supply Class is 3610 Printing Duplicating And Bookbinding Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like DR499B.