Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FEK 031.1661 found under Cap Electrical by Schurter Gmbh. The National Stock Number assigned to this part is 5999121970026, 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 FEK 031.1661.