Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 44B3521-493B found under Cover Adjusting Scr by Carrier Corporation. The National Stock Number assigned to this part is 2825011714800, and the Federal Supply Class is 2825 Steam Turbines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 44B3521-493B.