Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 311-Q140-W-TIMER-DRAIN found under by L And R Manufacturing Co Inc. The National Stock Number assigned to this part is 6520011806964, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 311-Q140-W-TIMER-DRAIN.