Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1639-8-3-2RW-UL LP-NS-9H-1 found under Tape System Dual Buffered by Digi International Inc. The National Stock Number assigned to this part is 7025010444570, and the Federal Supply Class is 7025 Adp Input Output And Storage Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1639-8-3-2RW-UL LP-NS-9H-1.