Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 72-5845-006 found under Tester Cylinder Compression by Coltec Industries Inc. The National Stock Number assigned to this part is 4910002945057, 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 72-5845-006.