Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 666144-187 found under Circuit Breaker by Bae Systems Information And Electronic Systems Integration Inc Div Bae Systems. The National Stock Number assigned to this part is 5925008184811, 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 666144-187.