Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NCN4S1-2 found under Nut Plain Clinch by Viking Technologies Ltd. The National Stock Number assigned to this part is 5310001504041, 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 NCN4S1-2.