Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 300-C1-S3 found under Hygrothermometer Digital by Eg And G Inc. The National Stock Number assigned to this part is 6685012610297, 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 300-C1-S3.