Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 52040U found under Locking Device Circuit Breaker by R W Beckett Corporation. The National Stock Number assigned to this part is 5925016140838, and the Federal Supply Class is 5925 Circuit Breakers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 52040U.