Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number GBF-17 64 X5.75 found under Probe Eddy Current by Tyvin Corp. The National Stock Number assigned to this part is 6635012679602, 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 GBF-17 64 X5.75.