Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3R4C1 found under Probe Electrode by Warrick Controls Inc. The National Stock Number assigned to this part is 4630005077745, and the Federal Supply Class is 4630 Sewage Treatment Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3R4C1.