Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BX-SP136 found under Tool Box Portable by Suburban Tool Inc. The National Stock Number assigned to this part is 5140016211664, and the Federal Supply Class is 5140 Tool And Hardware Boxes. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BX-SP136.