Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 74155 found under Gage Profile by Wheelabrator Corp The. The National Stock Number assigned to this part is 5220007762982, and the Federal Supply Class is 5220 Inspection Gages And Precision Layout Tools. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 74155.