Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 139042-1 found under Tank Fuel Aircraft by Fleet Readiness Center Southwest. The National Stock Number assigned to this part is 1560013821500, and the Federal Supply Class is 1560 Airframe Structural Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 139042-1.