Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4-M-200-230-260 found under Indicator Temperature Card by Wahl Instruments Inc. The National Stock Number assigned to this part is 6685011270044, 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 4-M-200-230-260.