Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2179HL5 MI6 found under Indicator Electrical Tachometer by Dynalec Corporation. The National Stock Number assigned to this part is 6620002289472, and the Federal Supply Class is 6620 Engine Instruments. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2179HL5 MI6.