Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 492-040 found under Nut Plain Hexagon by Ampex Great Britain Ltd. The National Stock Number assigned to this part is 5310991206897, 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 492-040.