Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PE 20661-001 found under Delay Line by Pulse Engineering Inc. The National Stock Number assigned to this part is 5999012194474, and the Federal Supply Class is 5999 Miscellaneous Electrical And Electronic Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PE 20661-001.