Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 101-4-180-200-230-250 found under Sensor Temperature by Wahl Instruments Inc. The National Stock Number assigned to this part is 6685004383386, 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 101-4-180-200-230-250.