Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 40-272-643 found under Nut Self Locking Pl by Meggitt U K Ltd. The National Stock Number assigned to this part is 5310006296280, 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 40-272-643.