Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HS4490-1 found under Latch Snapslide Fastener by Boeing Company The. The National Stock Number assigned to this part is 5325011841834, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HS4490-1.