roadholder badge screws

Is there a vendor or hardware store I can get the mounting screws for roadholder plates? I am not familiar with the mounting so don't really know from what material they are made.

RGM Motors here in England list the badges complete with rivets, their part no. RGM018, around £3 each.

From memory I think they are what we know as 'drive screws'
They are a small rivet with a slight spiral shape down their sides and they are just tapped into the hole,
hope this helps,
Dave.

Thanks Dave.

I'm looking for a Brass set also, they were on the 1950s Roadholders, in the 60s the forks had a roadholder decal/water transfer on them that looks good but not nearly as good as the brass.

I'm going to measure the holes and order the drive screws from a hardware supplier. The badges are cheap on ebay.

Back then, small screws like the ones the fork badges were attached with were called "British Association" threads, listed as "BA". They were extensively used in electrical gear. They had 25.4 threads per inch. Amazing that's how many millimeters there are in an inch! They had been stolen from a set of Metric standards and renamed.

I think my old "Machinery's Handbook" might still have the specs. Let me know if you need more info.

frankdamp said:

Back then, small screws like the ones the fork badges were attached with were called "British Association" threads, listed as "BA". They were extensively used in electrical gear. They had 25.4 threads per inch.

Click to expand...

0 BA was 25.4 tpi, but that was .2360" (or just about 6mm) diameter, so 0 BA would seem rather large for fork badge screws?

BA thread chart: http://www.britishfasteners.com/threads/

If I can get a diameter the length doesn't really matter.

The BA series of threads goes from 0BA (6mm dia x 25.4 TPI) to 26BA (0.79 mm dia x 134 TPI) I guess only the 0BA size was 25.4 TPI - I mis-remembered. Here's the table (0 thru 12):

Designator ...... 0 ........1........2........3........4........ 5.........6........7........8........9........10.......11.....12
o/d (MM)........6.00.....5.30....4.70...4.10...3.60....3.20....2.80...2.50...2.20...1.90....1.70....1.50..1.30
TPI................25.4..... 28.2...31.4....34.8...38.5....43.0....47.9..52.9...59.1....65.1....72.6... 82.0..90.7


Interesting that the diameters are defined in mm and the thread in TPI!

Second Try!

I ended up finding a pair of badges and screws for 10.00 on ebay. I think that's about as cheap as it gets.