Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CK-103 53L-CASE found under Case Assembly Monitor Chemical A by Manning Systems Inc. The National Stock Number assigned to this part is 6665014866522, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like CK-103 53L-CASE.