MTH Experts! What is this screw on a 30-20126-1?

I bet I can find some of those around here. I pull them off when I two rail. So the screws are stripped right? how are the hole's threads?

Give me an address to send them to.

jwpcfv (at) msn.com

Ooops! I thought you just needed the regular screws. I'll go check and see if I can find out what they are and if I have anything longer?

Did you try ACE hardware?  they have a huge selection of fasteners

Thanks Joe,  I wonder if these are the wrong screws for the application.  they only engaged a thread or two in the hole.  I think the box was bumped and out they came.  the other end truck held.

Servoguy, The idea of ACE is great but the nearest big one is 40 miles away, Free Union is the boondocks!  I may do it over the weekend but I don't want to screw up the threads in the hole by choosing the wrong metric screw.  I was hoping someone knew what it was.

Well I bet someone here does. I just checked and they match other screws used in MTH's engines with regular (button) phillips heads. I found two spares right away but they are very short (6mm total length with head, 4 mm of thread).

 The better news is I found one extra long one in my stash that matches and is 9mm long overall. 6+ mm of thread. I can't find a second one to match though.

 The problem for me is I don't have anyway to tell you what they are. I just save old and extra screws from jobs. I'd guess 3 or 4mm??

 I think you'd be best to get them from micro fasteners if you want extras when you find out what they are. I don't have much luck with tiny screws at stores.

https://www.microfasteners.com/home.php?cat=745

 BTW, I can sometimes get the truck to turn just enough without removing anything to get at the pilot screws in three rail from each side.

 Once I fix the pilot, the trucks don't turn that far anymore.

and I'm not an expert either. Just stayed at a Holiday I....... you know.

I need to try the holiday I... too.  I looked up metric screws and, for example, M3 is 3mm od on the screw.  I think that is what I have.  I will check microfasteners to see what they have.

the interesting part is, if these are the accurate specified screws (the ones I have are about 4mm of thread) then they are a problem waiting to happen since they only engage a very small number of threads when they are inserted, 1 or 2 at the most.  Like I mentioned, a box bump from our friendly postal system stripped two of them out on this unit. Wonder if anyone at MTH is thinking about making them longer if this theory is true

The strap goes over the coupler wires.  If you do not find the tapered screws you can get by with a screw that does not have the flat head.  I have seen longer flathead tapered screws at Lowe's.

I just ordered a three life time supply from microfasteners 50 each of the M3x 5mm, M3 x 6mm and M3 x8mm.  If anyone needs any of these let me know - I will have plenty by the end of next week.  Let's hope the M3 is the right thread!

Marty,

We do have a Lowes in town.  I may check them to see if they carry M3 screws, thanks.

Marty,

A quick question, you are an MTH tech, why can't I find this engine's exploded view on the MTH site since it is so new?  Is there a trick I don't know?  I should have been able to identify this screw days ago????

None exist at this time.  I wish I could help. The only help would be to do a search on a similar engine and find one with a breakdown.

The correct screw is 3mmx6mm flathead. There is a parts breakdown on the web. Try SD70Ace on MTH's website. So if you want a longer one you would need a 3.0mmx8.0mm

You'll find all the flat head, Philips drive, metric screws you'll ever need at:

http://www.microfasteners.com/home.php?cat=745

Thanks Chuck (and all), the parts breakdown I found just  was for a 2007 unit but it looks the same construction wise.  Apparently this is a manufacturing problem, the screw I have is 3mmx5mm and a 2mmx6mm (the correct screw)  would have had more bite into the hole- probably would not have broken. 

As luck would have it I bought both 3x6 and 3x8 from microfasteners.  I'll use the 3x8 if they fit.

Just for reference, try typing in the search box 20-2771-1. That will bring up the 7/15 revision parts breakdown.

looks like #39 down on the correct page for the pilot mounts. I'd better save this one!