Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BFN442-4-6 found under Nut Self Locking Plate by Bristol Inc. The National Stock Number assigned to this part is 5310002794284, 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 BFN442-4-6.