Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A443 found under Block Connector Mounting Actuato by Simmonds Precision Products Inc. The National Stock Number assigned to this part is 1680002364051, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A443.