Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CY 5250 ULM 503 found under Cabinet Electrical by Joint Electronics Type Designation. The National Stock Number assigned to this part is 5975012816172, and the Federal Supply Class is 5975 Electrical Hardware And Supplies. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like CY 5250 ULM 503.