HPE Part Numbers Explained: -B21 Option Kits vs -001 Spare Parts

Nov 5, 2026 | HPE

HPE gives most parts two numbers. One ends in -B21 and one ends in -001. They are not two names for the same thing, and that is what trips people up. What -B21 means -B21 is the option number. It is what HPE sells a kit under, and it is the number you see on a price...