Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KFN541L-4F found under Nut Self Locking He by Bae Systems Operations Ltd. The National Stock Number assigned to this part is 5310016017639, 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 KFN541L-4F.