Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WA55H found under Shaft Clutch Takeof by Heil Environmental Industries. The National Stock Number assigned to this part is 2520000920016, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like WA55H.