Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D59-981-1PC43 found under Screw Thumb by Electric Boat Corp. The National Stock Number assigned to this part is 5305004682751, and the Federal Supply Class is 5305 Screws. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D59-981-1PC43.