Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 54864 found under Tap Thread Cutting by Tapco. The National Stock Number assigned to this part is 5136016255011, and the Federal Supply Class is 5136 Taps Dies And Collets Hand And Machine. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 54864.