What do I need to thread a hole in metal so I can put a screw in?

[DenaliAK]

Probably yet another dumb question, but I am trying to finish a fog light retro and I have these holes through the projector I'm using. I need to run a screw into the holes to mount it, but right now they aren't threaded and I'm destroying screws trying to get them in. What/how do I make it so it's threaded correctly so the screws will seat properly?

 

[jdpber]

determine the ID (internal diameter) of the hole and the OD (outer diameter) of the bolt you intend to use.. go to ACE or a big box hardware store and get a tap that is for the size of bolt you are going to use.. this is a tool that is made of heat treated (hardened steel) that cuts the treads into the metal for you for a bolt to thread in..

 

[DenaliAK]

Awesome. I can do that. Thanks!

I figured it was something easy, but I didn't know what it was called. I hate going to the hardware store and having to describe what I'm trying to find....

 

[JochenWoern]

determine the ID (internal diameter) of the hole and the OD (outer diameter) of the bolt you intend to use.. go to ACE or a big box hardware store and get a tap that is for the size of bolt you are going to use.. this is a tool that is made of heat treated (hardened steel) that cuts the treads into the metal for you for a bolt to thread in..

Or, ............ if the metal is not all that thick, use a self tapping screw. Pre-drill with a considerably smaller diameter then the screw and the self tapping screw will work its way into/through the metal.

 

[Rivieraracing]

Or, ............ if the metal is not all that thick, use a self tapping screw. Pre-drill with a considerably smaller diameter then the screw and the self tapping screw will work its way into/through the metal.

+2 on this advise, both are good but since you are talking about a fog light bracket instead of threading through the frame or something, a self tapping screw should be all you need. They do make different strengths/quality screws so be sure to ask the ACE people and they should point you into the right direction for what you need!! Also, try to get some with a hex head instead of a phillips or something of that nature, they would be easier to use!!

 

[bkboatnsleds]

yep.. they have some self tappers you dont even need to drill a hole.. Put a little Umph behind the drill as you screw it in!

 

[Ryan1126]

you can get dewalt drill and tap kits at home depot for like $7