Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MBD-233B found under Boltmachine by Prestolite Electric Inc. The National Stock Number assigned to this part is 5306016753819, and the Federal Supply Class is 5306 Bolts. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MBD-233B.