- Conyers, Georgia, United States
- Oct 20th
OSG - 1/2-20 UNF, H3, 3 Flute, Oxide Coated, Vanadium High Speed Steel Spiral Flute Tap Modified Bottoming Chamfer, Right Hand Thread, 3-3/8 Inch Overall Length, 1-21/32 Inch Thread Length, 0.367 Inch Shank Diam, Series 290 Features and Benefits Modified bottoming chamfers are similar to bottoming chamfers, but they are longer and have more teeth. They are used for threading blind holes and have 2 to 2-1/2 threads.