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TR2/3/3A TR3 Dist points plate hold down screw size?
- Thread starter karls59tr
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Bruno_69z28
Senior Member
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Took it out, measured it, 3/16-32. I think this one will be hard to find.
Bill
Bill
Bruno_69z28
Senior Member
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Karl,
That is the screw that holds down the points. I Also measured the two screws that hold down the plate. It's around .137 in. at aprox. 38 tpi. I've never come across a screw this size. I know they have a 6-32 and 6-40, but it didn't match up to the tpi gauge. Maybe someone else has more input.
Bill
That is the screw that holds down the points. I Also measured the two screws that hold down the plate. It's around .137 in. at aprox. 38 tpi. I've never come across a screw this size. I know they have a 6-32 and 6-40, but it didn't match up to the tpi gauge. Maybe someone else has more input.
Bill
TR3driver
Great Pumpkin - R.I.P
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I'm pretty sure it's a BA (British Association) thread. Probably 4 BA, according to both my (increasingly feeble) memory and Bill's measurements above. 4 BA would be a "nominal" .1417" in diameter (but the actual threads always measure slightly smaller) and 38.5 tpi.
Nearly all of the Lucas components on a TR3 used BA or BSF threads.
Nearly all of the Lucas components on a TR3 used BA or BSF threads.
TexasKnucklehead
Jedi Knight
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Karl,
pm me if you are talking about the screws that mount the plate to the housing. The two cross-head screws are weird, but I found a pack some time back that are slightly too long. I have a few left over and I'd be glad to send you some. I don't even remember if I had to shorten them of use them as is, but know I replaced them in the tr6 and tr3.
jerry
I'm looking at #6-40 x 5/8 -they may not be exact, but they work.
pm me if you are talking about the screws that mount the plate to the housing. The two cross-head screws are weird, but I found a pack some time back that are slightly too long. I have a few left over and I'd be glad to send you some. I don't even remember if I had to shorten them of use them as is, but know I replaced them in the tr6 and tr3.
jerry
I'm looking at #6-40 x 5/8 -they may not be exact, but they work.
kurts100
Senior Member
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Try British Tools and Fasteners (www.britishfasteners.com) in Lyons, NY. I needed BSF bolts BSF helicoils for my 100-4 and they had what I needed.
Kurt
Kurt
Britishtools
Senior Member
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Hello,
A little late in replying, sorry...but if its a 3/16"-32 you need, it would probably be a 2 BA thread, not a 4 BA.
2BA = .1850" and 31.56 TPI
We have lots to choose from.
A little late in replying, sorry...but if its a 3/16"-32 you need, it would probably be a 2 BA thread, not a 4 BA.
2BA = .1850" and 31.56 TPI
We have lots to choose from.