Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 124C1331-44 found under Nut Self Locking Hexagon by Kapl Inc. The National Stock Number assigned to this part is 5310008664480, 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 124C1331-44.