Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4B6074 found under Nut Plain Castellated Hexagon by Holt Bros. The National Stock Number assigned to this part is 5310002686164, 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 4B6074.