--Actually there are two different style bits: one that produces the flange and one that cuts it off. Mostly I prefer to keep the flange on as it means no material removal and therefore less weakening of the part.
Puncture through sheet metal for tapping
Jul 20, 2008
23 Replies
Nice ! McMaster-Carr are on the wrong side of the pond for me but I'll have to ask my supplier if they have anything like that. Thanks.
And one more wrinkle no-one has mentioned yet: you can get self- tapping screws that use a roll-form tip rather than a tap cutting tip. I don't know how much $$$, though.
--Glenn Lyford
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The common hardware store ones are like type AB.
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