Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EPN-0003189 found under Hinge Butt by Sea Box Inc. The National Stock Number assigned to this part is 5340016302799, 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 EPN-0003189.