Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BCN445C4-5 found under Nut Self Locking Ga by Bristol Inc. The National Stock Number assigned to this part is 5310011312248, 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 BCN445C4-5.