Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SPM-1308B FIG.3 ITEM NO.42 found under Circuit Breaker by Miller Electric Mfg Co. The National Stock Number assigned to this part is 5925014326603, 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 SPM-1308B FIG.3 ITEM NO.42.