Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5 3 7112 found under Thermometer Indicating Capillary by Cooper Instrument Corp. The National Stock Number assigned to this part is 6685014756641, 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 5 3 7112.