Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A B-837-A2A found under Switch Thermostatic by Rockwell Automation Inc. The National Stock Number assigned to this part is 5930010610923, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A B-837-A2A.