Ok, now that I have your attention!

I have a Rally clock, that is missing a knob! I have recieved good information from Zclocks that the knob off the 280ZX digital clock is similar, and it is. (I have a bunch of new ones if anyone needs one) The attatchment screw, however, isn't even close!

The rally clock Fastener is

a standard slotted

1.37mm in diameter(the threaded area) with

.3mm thread pitch

8.04mm in lenght overall including a

3.15mm shoulder

I have been hunting a similar screw on the internet and locally for several days and am no closer than I was the day I bought the clock.

If you have a spare, or a good lead where one that fits could be found, I WOULD GREATLY APPRECIATE IT!

Will

Will - Can you post a few pics of the screw from the other knob? Would they be identical? I have a wide assortment of screws of this type and will look through them and possibly find something you can use. I can gauge them from the measurements you gave but I am unsure of the shoulder detail. Is it a square shoulder? How wide & deep is the slot?

Will, there is a local company near me appropriatly called "The nutty company" of Derby CT.They do have a website but I do not know how specific it is. Send them a email or if you like I can get there this wekeend to see if they have it.

Ron, Jim,

I'll post a pic an more details this afternoon, and it appears they are identical(the knob and screw fit either side).

Thanks!

Will

Here is a measured drawing(pardon my lack of drafting training!)

Please let me know if I have made this complicated enough-I can do better!

Will

That's perfect Will. I'll start going through my bins. I can probably make one if I don't find one. I usually use a mix of gun bluing to come up with the right color.

Is it a square shoulder? How wide & deep is the slot?

Was This really necessary?

Will - I came up with several, one in particular that would work. The only problem and I don't know if it would show once installed, is the 3.15mm head height you specified. It comes up short. Overall length is a little longer than needed though. I will try to get pics up later. Two other possibilities to find a better match would be an eyeglass outlet, or sign up on a model railroad site and ask them. Just don't show up back here wearing one of those big hats!

Ron,

When Installed the head of the screw is below the surface of the knob(I'll try to post a measured pic between diaper changes tonight), and it is recessed into the knob. The recess is not as deep in the 280zx digital clock knob either(once again, I'll try posting pics as the night unfolds).

Will

BTW, I git somethings in the mail yesterday-just cleared my wifes version of customs tonight!

Nothing to help you but as you knew it would be: a very good attention getter. I will have to keep in mind for future use.

Ron,

Here is skinny on the knobs!

Will

Ok Will - That's enough information to come up with one suitable. The 3.1mm head height is to provide more support for the knob to keep it from breaking. The one I have in mind would work well with a washer of the same diameter bonded to it. I need to come up with another thread gage. I'm using a gauge from my metric SnapOn tap & die set. The smallest gauge is .35mm and the smallest die in the set is 3mm (useless in this case). That makes it guesswork until I get the thread measured properly. I'll do it tomorrow. A thread pitch of .30mm is tough to measure with a .35 gauge.