Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 492-009 found under Nut by Ampex Data Systems Corporation. The National Stock Number assigned to this part is 5310004108002, 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 492-009.