Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HKW3400W found under Circuit Breaker by Cutler Hammer. The National Stock Number assigned to this part is 5925015304377, 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 HKW3400W.