Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WM 3138 24SF found under Attenuator Assembly by Wilkes And Mc Lean Ltd. The National Stock Number assigned to this part is 5985016456303, 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 WM 3138 24SF.