Help needed with my Hawthorne tank

[ChadB]

Ok, I removed the tank from my CWC Hawthorne, to be used on my Roadmaster. Problem is, I don't see how the back part of the tank is held together...There are holes in both sides, one larger than the other, but no bracket, nothing to put a bolt into, like in the front of the tank. Was there a special fastener originally with the tank? Is there some way I can substitute something for it?

Here's the tank...Notice the 2 holes in the back:

Any help would be appreciated.

 

[2manybikes]

Originally I think there was a nut and a screw. The nut looked sort of like the head off of a countersunk screw that had a threaded hole in it.The nut was pobably in the bigger hole and a countersunk screw went in the other hole.

 

[rms37]

Hi Chad,

Some of the postwar CWC tanks used a rear fastener that has a threaded counter sunk machine screw on the one side and a long internally threaded tubular fastener with a larger countersunk head on the side with the large hole. The two pieces are about equal in length. I don't know if they are truly specific to CWC or a more generic piece of hardware but are probably not easy to find either way. I have one tank that uses that fastener and will send you a picture if I can locate it. If you can't find the exact piece you could probably use two appropriately sized machine screws and mate them with a threaded collar inside the tank.

 

[ChadB]

Hi Chad,

Some of the postwar CWC tanks used a rear fastener that has a threaded counter sunk machine screw on the one side and a long internally threaded tubular fastener with a larger countersunk head on the side with the large hole. The two pieces are about equal in length. I don't know if they are truly specific to CWC or a more generic piece of hardware but are probably not easy to find either way. I have one tank that uses that fastener and will send you a picture if I can locate it. If you can't find the exact piece you could probably use two appropriately sized machine screws and mate them with a threaded collar inside the tank.

Thanks Phil,

Any help you could provide in locating such a fastener would be much appreciated. I figured it wouldn't be as simple as a bolt with 2 nuts on either side. My neighbor, who is a contractor, says he THINKS he has such a piece, he just has to find it. I'm hoping somebody out there who reads this, or hears about it, can hook me up with this mysterious fastener.

 

[udallcustombikes]

This might be what you need.
http://www.mcmaster.com/#barrel-nuts/=49hrhd

 

[deorman]

If you use the all-thread coupler("threaded collar")method, you could lock it to a certain distance w/ a lock nut to prevent squeezing the tank. :|

 

[socal_jack]

The screw at the bottom is what the original looks like, a 2 piece custom job. Both screw heads were too small I think, but you can make a good replacement that will fit flush using a 3/8-16 X 1/4-20 rod coupler and two hex head screws, got 'em at Ace Hardware.
top home made - bottom factory

original

new big side

small side

 

[ChadB]

Thanks for the help..I wrote it all down and I'll head out to the hardware store this weekend.

 

[socal_jack]

No problema, I'll make some measurements later on the thread length the 3/8 side is short maybe 1/2" of thread, 1/4 side probably on the order an inch or slightly more.

EDit 3/8 screw has 3/8" thread, 1/4 has 3/4"