Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number USB 1SP4T A18 found under Switch Radio Frequency Transmiss by Scientific Components Corp. The National Stock Number assigned to this part is 5985016640346, 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 USB 1SP4T A18.