Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EV4254 found under Valve Rotary by General Signal Corp. The National Stock Number assigned to this part is 2240006767089, and the Federal Supply Class is 2240 Locomotive And Rail Car Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like EV4254.