Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number STR 58U found under Circuit Breaker by Merlin Gerin. The National Stock Number assigned to this part is 5925016229191, 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 STR 58U.