Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4166K S N 9636765 found under Control Temperature Indicating by Proconex Inc. The National Stock Number assigned to this part is 6685012450996, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4166K S N 9636765.