Tap and die size

[Chilow]

Does anyone know what size tap I need? Please see borrowed picture. It’s located underneath of the vehicle on the driver side. The bolt hole on mine seems to be cross threaded. Thanks in advance!

 

[S54MCoupe]

Almost positive it's M8 x 1.25

 

[Jeremy556]

Check the thread pitch of the bolt? Most likely M10, 8 or 12x1.25

That looks kinda like a skid plate crossmember, is that the case? Does it not have anything going under the frame rail and actually relying on a tiny low rated bolt in single sheer?

 

[Chilow]

Check the thread pitch of the bolt? Most likely M10, 8 or 12x1.25

That looks kinda like a skid plate crossmember, is that the case? Does it not have anything going under the frame rail and actually relying on a tiny low rated bolt in single sheer?

Correct, it’s for a skid plate. I’ve never used a tap/die set before, but just watched some videos on it and it seems pretty straightforward. Only thing I couldn’t find is how to determine which size tap to use so I can buy the correct one.

 

[Jeremy556]

Correct, it’s for a skid plate. I’ve never used a tap/die set before, but just watched some videos on it and it seems pretty straightforward. Only thing I couldn’t find is how to determine which size tap to use so I can buy the correct one.

Do you have a link to more info on the skid plate(s)? I'm trying not to jump to judgement, but what is shown in the picture is clown shoes

 

[Jeremy556]

Also, you can get thread cleaning kits that are much cheaper than quality taps, but lack the cutting ability of actual taps.

 

[S54MCoupe]

Do you have a link to more info on the skid plate(s)? I'm trying not to jump to judgement, but what is shown in the picture is clown shoes

There are legs that sit under the frame that would absorb an impact. The bolt wouldn't receive any vertical sheer force.

 

[manganos]

Is there a bolt/screw etc on the other side you can take off and bring to the store? You can measure size/pitch etc with that bolt then figure out what size die/tap to purchase. Personally I'd just leave it in there as is.....

 

[Jono.ful]

Correct, it’s for a skid plate. I’ve never used a tap/die set before, but just watched some videos on it and it seems pretty straightforward. Only thing I couldn’t find is how to determine which size tap to use so I can buy the correct one.

Make sure you use lots of rapid tap or similar tapping oil, and turn the tap once anticlockwise for every couple turns clockwise

 

[wfo9]

Do you have a link to more info on the skid plate(s)? I'm trying not to jump to judgement, but what is shown in the picture is clown shoes

That is the RCI cross member, It actually wraps around the frame rails... That bolt is just used to hold it up against the rails.

OP, that bolt is a bit tricky. Thread it in a few times without the cross member in place.... I can't remember the size, but my guess is m10, possible m8 They are all pretty much 1.25 tp. Taps are nothing more than really hard bolts missing some sides.. It's very easy to take another correctly sized bolt and shave the sides off just to clean out threads.

The trick in a spot like that for a tap is having enough room to get it in perfectly straight and turn it with the T-handle. You have to have room. That is the reason I often use the shaved bolt technique.

 

[Chilow]

That is the RCI cross member, It actually wraps around the frame rails... That bolt is just used to hold it up against the rails.

OP, that bolt is a bit tricky. Thread it in a few times without the cross member in place.... I can't remember the size, but my guess is m10, possible m8 They are all pretty much 1.25 tp. Taps are nothing more than really hard bolts missing some sides.. It's very easy to take another correctly sized bolt and shave the sides off just to clean out threads.

The trick in a spot like that for a tap is having enough room to get it in perfectly straight and turn it with the T-handle. You have to have room. That is the reason I often use the shaved bolt technique.

Yes, this is for the RCI cross member. I tried removing it and threading it in without the rci piece, but it will thread in by hand about a few turns and it won’t go in straight no matter how I like it up. It always ends up being crooked. Thought it was due to the rci supplied bolt, but when I try to use the oem bolt, still no luck.

 

[Ghostrider]

try to get one with the dies that are hex shaped so you can use a socket wrench at times.

 

[e60ral]

do you want an okay set, or do you just want a set for this bolt? if it doesn't need to be good quality, a $15 set from harbor freight will work just fine to clean some threads

 

[MossJenks]

What are you trying to buy/accomplish here? Are you a mechanic who works on a variety of vehicles and needs a good quality set on hand that covers most any thread size you are likely to come across and to create various threads in custom fabricated parts? Or are you just a Toyota owner who needs to clean up the threads in a bolt hole? If you are the former then a good expensive set is what you want to have. If you are the latter then just buy the tap you need and a handle for it.

 

[delloro]

OP, a tap may not solve your problems, as it may cut a whole new set of threads instead of cleaning up the originals.

I would try to work in a bolt. Be patient and use oil. Use an OEM-style bolt with an unthreaded tip.

 

[S54MCoupe]

A harbor freight tap and die set was the best purchase I made for this truck. I had to retap all the skid plate holes and all the holes for the sliders as well as several others.

 

[WillieOsgood]

Hey Chilow, I think you are about to concern for tap size and hoping this can be a piece of great information for you that I need to share! Threading is distributed in portions into 2 types such as internal and external. The taps and dies equally can be put into service for cutting new threads or repair damaged threads. The overall size 5/8 Inches can be handy while you cut or repair damaged threads. For more information, you can visit this page to consider the best job.