Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 73517 found under Gage Thickness by American Telephone And Telegraph Co. The National Stock Number assigned to this part is 5210001979694, and the Federal Supply Class is 5210 Measuring Tools Craftsmens. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 73517.