fuel tank sender screws

[tysonn]

PM me your address I'll send you some 4BA.You may have to cut the length down.How many?
Mick

[hanvyj]

Six would save me buying some, I don't mind paying you for them. One would be fine just to save me buying another set. Do you have a car? You could test the 4BA, might save some trouble if it doesn't fit after all.


Is the sender on the Minor Lucas? I found this:

https://www.holden.co.uk/displayproduct ... de=070.226

Which actually lists the thread (at last!) as 8-32 UNC, which should be 4.1656 millimetres diameter, which sounds sensible, but is another frustrating possibility! It only specifies lucas, six holed senders though, not Morris Minors.

[tysonn]

LOL never thought of that!I'll try one in my car tomorrow.

[tysonn]

OK.Removed one of mine.Its not 4BA although a 4BA does work albeit a little slack.The pic shows the original,a 4BA and a metric (which is too tight).Measurements in that order are:
.160ish
.136ish
.150ish[frame][/frame]

[hanvyj]

Thanks a lot for taking the time to test.

It could be 3BA, 0.1610 inch diameter and 34.8 (guessing the actual sender screw is about half an inch or 3/8'' long in the picture) threads per inch. But the 8-32 UNC is also pretty close at .1640 and 32 threads per inch.

[tysonn]

Plenty on Ebay cheap enough to take a punt.

[hanvyj]

£3. Ordered, fingers crossed!

[tysonn]

I reckon you'll be right!

[hanvyj]

So close! Perfect diameter, looked right - even screwed in nicely a few mm... but alas, nope.

Upon comparison, there are a few too many threads per inch. 8-32 UNC seems to be the only candidate left - shame they are so much harder to get hold of than 3BA.

Edit: Found some on ebay for £3...

[hanvyj]

8-32 UNC fits, Hurah!

However, I think I've discovered the reason the first bolt snapped: the thread is somehow messed up. I think the plate welded to the tank that has the threads isn't lining up with the hole properly.

This ESM tank has been nothing but trouble...