Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HC-690B found under Bushing Governor by Siemens Demag Delaval Turbomachi. The National Stock Number assigned to this part is 5365001759184, and the Federal Supply Class is 5365 Bushings Rings Shims And Spacers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HC-690B.