Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 550X134 found under Regulator Voltage by Stewart And Stevenson Power Products. The National Stock Number assigned to this part is 6110000517388, and the Federal Supply Class is 6110 Electrical Control Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 550X134.