Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 18W-1 found under Attenuator Fixed by Aeroflex Weinschel Inc. The National Stock Number assigned to this part is 5985012284879, and the Federal Supply Class is 5985 Antennas Waveguides And Related Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 18W-1.