Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5R-9111 ITEM 68 found under Isolator Radio Frequency Reflect by Caterpillar Inc. The National Stock Number assigned to this part is 5985013606575, 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 5R-9111 ITEM 68.