Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number T55-20-053 found under Thermal Release Circuit Breaker by Component Hardware Group Inc. The National Stock Number assigned to this part is 5925014698902, 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 T55-20-053.