Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 398 001 found under Nut Self Locking Hexagon by Vermeer Manufacturing Company Inc. The National Stock Number assigned to this part is 5310013296931, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 398 001.