Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CAL4400-1PC54 found under Damper Assembly by Barkley Mfg Co. The National Stock Number assigned to this part is 6110004681634, and the Federal Supply Class is 6110 Electrical Control Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like CAL4400-1PC54.