Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 137-C3-S10AP-MR found under Indicator Dew Point by Eg And G Inc. The National Stock Number assigned to this part is 6685004422008, 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 137-C3-S10AP-MR.