Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5BK0406 found under Thermometer Self Indicating Bime by Weksler Glass Thermometer Corp. The National Stock Number assigned to this part is 6685002916815, 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 5BK0406.