Screws for Shroud on Coleman Mach 15 AC

[itat]

I went up on my roof today to check the seals before winter storage and discovered that one of the screws holding the shroud on my Coleman Mach 15 (Model 48204c869) is missing. Doing some research I've found the Airxcel part number for a package of 4 "screw nut and washers" is 6792-5111.

https://www.airxcel.com/DesktopModul.../Pdf/r583a.pdf

On Amazon.com, they want US$19.99 with free shipping. On Amazon.ca they want CAD$46.51! That's more than a little pricey considering I only need one.

I didn't have any tools with me to take out one of the other screws so I don't know what size they are. Does anybody know the size and if they are readily available at a big box hardware store like Home Depot or Lowes?

[itat]

[mmoody]

I'll get up on mine in the morning and see what is holding my Mach III covers on. Its raining tonight.

[itat]

Originally Posted by mmoody

I'll get up on mine in the morning and see what is holding my Mach III covers on. Its raining tonight.

Thanks. Appreciate it.

[mmoody]

My Mach shroud is held down with 1/4"-20 x 3/4"L screws.
(That's 1/4" National Coarse or 20 threads per inch.) A very common size and not hard to find even in stainless steel. They certainly wont be $5 a piece!
Good luck!

[itat]

Originally Posted by mmoody

My Mach shroud is held down with 1/4"-20 x 3/4"L screws.
(That's 1/4" National Coarse or 20 threads per inch.) A very common size and not hard to find even in stainless steel. They certainly wont be $5 a piece!
Good luck!

Thanks! I think they have a flat washer as well?

[NJKris]

I believe mine did.

[itat]

I bought a package of 1/4"-20 x 3/4"L screws at HD before heading out to the camper this morning. They are exactly the right size. Thanks! But I discovered that the flat washers I got are no where near as big as the ones on the AC. They work well enough so I put the AC covers on and called it good until the Spring when I’ll look for larger washers after I dewinterize and remove the cover.

[Bama Rambler]

Those large washers are called fender washers. They're about twice the OD of the standard washers.

[cfo111]

X2 on fender washers I even keep spares can always find need for other things for them.

[itat]

Thanks for the replies on the fender washers. I'll look for them next time I'm at HD or Lowes. The AC is covered for winter now so replacing the washer will have to wait until the Spring.

Interestingly, I also noticed that the 3 remaining screws are not exactly the same. One of them uses the larger #3 Robertson (black handled screw driver). The other 2 are exactly the same as the new one I bought. I'll be switching that one out in the Spring, too. I have no idea if the factory used the different screws or if the dealer did for their PDI. The dealer did have the cover off when I did my PDI so they are responsible for it being loose enough to come out. I know it was there when I checked the caulking earlier this year.