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BA sizes

Is 4BA the same as 1/4 inch hex?

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Michael Gilligan15/05/2021 09:57:13
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18325 forum posts
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Posted by Dr. MC Black on 15/05/2021 09:32:24:

[…]

I did NOT appreciate that the table came from Tubal Cain's book - I'll have to buy a copy.

...

.

Sorry, I did not specifically state that blush

I did, however, include the page number in the image ... largely for Nigel’s benefit.

MichaelG.

Michael Gilligan15/05/2021 10:00:30
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18325 forum posts
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Posted by Nigel Graham 2 on 15/05/2021 09:50:08:

Michael -

Oh there! Still took me a couple of readings to spot it.

Thank youl!

~'Twas all those 4s preceding it. I was always better at Reading & 'Riting than 'Rithmetic but combining them, well.....

.

yes

All’s well that ends well

Proof reading one’s own text is often difficult

MichaelG.

Howard Lewis15/05/2021 12:02:44
5036 forum posts
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Don't think that I have any BA thread gauges, (Typical! Whit, Unified and Metric but no BA  but will tap a nut 1 BA and try the Taps. They certainly don't want to go into a M5 nut!

1 BA is 0.9 mm pitch while M5 Coarse is 0.8, so difference in both diameter and pitch!

An order for new Taps is imminent. Hand, Spiral Point, or Spiral Flute? is now the decision

Howard

Dr. MC Black15/05/2021 13:04:04
228 forum posts
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Proof reading one’s own text is often difficult

MichaelG.

As the former publisher for the University of London, I can safely write that proofreading one's own text is more than difficult.

One sees what one intended to write rather than what's on the paper

With best wishes and thanks again.

MC

Dr. MC Black15/05/2021 13:08:19
228 forum posts
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Posted by Howard Lewis on 15/05/2021 12:02:44:

Don't think that I have any BA thread gauges, (Typical! Whit, Unified and Metric but no BA but will tap a nut 1 BA and try the Taps. They certainly don't want to go into a M5 nut!

1 BA is 0.9 mm pitch while M5 Coarse is 0.8, so difference in both diameter and pitch!

An order for new Taps is imminent. Hand, Spiral Point, or Spiral Flute? is now the decision

Howard

Did you try comparing the Tap with an existing 1BA screw?

I recently bought a BA thread gauge on E.Bay for less than a fiver - I guess most of that was postage!

MC

Dr. MC Black15/05/2021 13:14:22
228 forum posts
1 photos

Posted by Howard Lewis on 15/05/2021 12:02:44:

Hand, Spiral Point, or Spiral Flute? is now the decision

Howard

Perhaps you should think about whether you want to include Serial Taps with Hand, Spiral Point and Spiral Flute?

I bought a set of M5 (or M6 - sorry forgot) serial taps in a "sale - reduced" and one of the set crumbled the first time that I used it! The supplier didn't want to know!

MC

br15/05/2021 13:57:51
678 forum posts
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A final bit on nut spinners as per original post

Nut spinners are used in the aircraft industry on terminal blocks on wiring looms

This is the vertical stud type with insulated seperators

So on a connection strip, loom terminals placed over stud, nyloc nut fitted and tightened with a nut spinner, until the nut spinner CLICKS

This is the preset torque arrangement in the handle to prevent over tightening.and putting stress into the stud.

Hope that makes sense.

bill

Dr. MC Black15/05/2021 14:46:13
228 forum posts
1 photos
Posted by br on 15/05/2021 13:57:51:

A final bit on nut spinners as per original post

Nut spinners are used in the aircraft industry on terminal blocks on wiring looms

This is the vertical stud type with insulated seperators

So on a connection strip, loom terminals placed over stud, nyloc nut fitted and tightened with a nut spinner, until the nut spinner CLICKS

This is the preset torque arrangement in the handle to prevent over tightening.and putting stress into the stud.

Hope that makes sense.

bill

That makes perfect sense.

Your spinner sounds a bit like a Torque Wrench

The Nut Spinners that I bought do NOT click in that way.

I still have an eye open for a 4BA or 1/4" Nut Spinner!

With best wishes and thanks again.

MC

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