Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number STS-1643 found under Hinge Butt by H A Guden Company Inc. The National Stock Number assigned to this part is 5340010486273, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like STS-1643.