Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B1064-39B found under Washer Key by Beaver Aerospace. The National Stock Number assigned to this part is 5310008236581, 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 B1064-39B.