Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MS20257H5-2900 found under Leaf Butt Hinge by H A Guden Company Inc. The National Stock Number assigned to this part is 5340004008458, 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 MS20257H5-2900.