Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4C1-179 found under Nut Plain Round by Eastman Machine Co. The National Stock Number assigned to this part is 5310015025975, 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 4C1-179.