Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NTB5503LM found under by Cases By Source Inc. The National Stock Number assigned to this part is 8145015960027, and the Federal Supply Class is 8145 Specialized Shipping And Storage Containers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NTB5503LM.