Guhring Spiral Flute Tap, Series: 4410, Measurement System: Imperial, UNF, 1/4-28, Semi-Bottoming Chamfer, 3 Flutes, HSS-E, TiCN Coated, Class of Fit: 2B/3B/H3, Right Hand Cutting, 0.354 in Thread Length, 2-1/2 in Overall Length, 0.255 in Shank Dia, Right Hand Flute Direction, H3 Thread Limit, Alloy Steel, Alloy Tool Steel, Aluminum Alloy, Case Hardened Steel, Cast Iron, Ductile Iron, Free Cutting Steel, Heat Treated Steel, Malleable Cast Iron, Stainless Steel, Structural Steel and Tool Steel Material Application