Straight Flute Hand Tap , 5/16-18 , Plug , 4 Flutes, UNC
Straight Flute Tap, Thread Size 5/16 In.-18, UNC, Plug, Overall Length 2 3/32 in, High Speed Steel, Bright (Uncoated), Right Hand, Thread Length 1 1/8 in, 75 Percent Thread Drill Size F, Thread Limit H3.