Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HDA 1566-1 found under Contact Electrical by Harco Manufacturing Company. The National Stock Number assigned to this part is 5999009901731, and the Federal Supply Class is 5999 Miscellaneous Electrical And Electronic Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HDA 1566-1.