• General purpose taps can be used by hand or under power,
in through (open both ends) or blind holes (closed one end) .
• Suitable for tapping most materials .
• Standard “H” limits provide adequate “class of fit .”
• Taper taps (7 to 10 threads) . Longest chamfer insures easier starting .
• Plug taps (3 to 5 threads) . Most common chamfer . Used in through or blind holes .
• Bottoming taps (1 to 2 threads) . Used for threading close to the bottom of a blind hole