-
Hey Guest!
British Car Forum has been supporting enthusiasts for over 25 years by providing a great place to share our love for British cars. You can support our efforts by upgrading your membership for less than the dues of most car clubs. There are some perks with a member upgrade!**Upgrade Now**
(PS: Upgraded members don't see this banner, nor will you see the Google ads that appear on the site.)
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
STOP!! Never post your email address in open forums. Bots can "harvest" your email! If you must share your email use a Private Message or use the 
smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
TR2/3/3A TR3 Dist points plate hold down screw size?
- Thread starter karls59tr
- Start date
Share this page
Bruno_69z28
Senior Member
Offline
Took it out, measured it, 3/16-32. I think this one will be hard to find.
Bill
Bill
Bruno_69z28
Senior Member
Offline
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
Offline
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
Offline
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
Offline
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
Offline
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.