2PK Century Drill & Tool 5/16-18 Carbon Steel National Coarse Tap-Plug

Machine screw and fractional plug taps. Precision cut threads for consistent exact threading. Heat treated and tempered for file hard threads and longer useful life. Designed for hand cutting applications. Designed for hand cutting applications. For use with tap wrenches to cut internal threads. 75% thread engagement. Plug style is the most commonly used style of tap with 3 to 5 threads chamfered.; For internal threading on all types of pipeHeat treated and tempered;