| Stanley Engineered Fastening STI Tap 1/2 -20 HSS 8FPB Screw Thread Insert STI Tap Thread Size 1/2 In.-20 UNC Overall Length 3 37/64 in High Speed Steel Bright (Uncoated) Right Hand Thread Length 1 21/32 in Tap Chamfer Plug Thread Limit H3 Number of Flutes 4 more | | $69.83 $58.26 FREE shipping go to store |