Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BPM-16-40AL found under Probe Bolt Hole by Olympus Ndt Ne Inc. The National Stock Number assigned to this part is 6635000185836, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BPM-16-40AL.