Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 813D-C00R-S31Y found under Thermometer Indicating Capillary by Weksler Glass Thermometer Corp. The National Stock Number assigned to this part is 6685002917837, 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 813D-C00R-S31Y.