A16/GS nut specification

Hi Ed,

Thanks very much for the data – it just goes to show how much work can be involved with what seems like a simple question.
Would gladly buy you a beer – come to Classic Fighters airshow at Omaka and I will buy you two ( or more)!

Going nuts

I realise that the A16 series for nuts has been superseded, but does anyone have a copy of the spec sheet for A16 nuts that they could post or send to me? Thanks.

CK,
I don’t have BS A16 ” Hexhagonal Steel Nuts (Ordinary, Thin, Slotted and Castle)” but this may be purchased from British Standards at significant cost. Sometimes I find, after assisting the balance of payments issue for Her Majesty’s Government, that the purchase of the Standard does not actually answer all the questions that would allow you to make any informed engineering decision, because the document is couched in terms that assume you have or know other documents of the period.

So here is A16 GS pieced together from a range of documents :

“RAAF Publication 434 1944 Correlation & Interchangebility Tables” giving A16Y -GS as 5/16 BSF , MS, slotted, RH with Standards Association of Australia and Commonwealth Aircraft Corporation equivalents.

[ATTACH=CONFIG]235729[/ATTACH]

Then we go to “RAAF Publication 314 Aeronautical Engineering Handbook 1944” giving pitch and dimensions

[ATTACH=CONFIG]235730[/ATTACH]

Then I checked this against “BS 916 : 1946 Black Bolts and Nuts” which is not the aerospace standard BS A16 but gives pitch and dimensions to show nuts are nuts:

[ATTACH=CONFIG]235731[/ATTACH]

None of these give metallurgical information so I looked at DAP Beaufort Division inspectors notes which give pitch, dimensions and metallurgy as BS S1, which you may purchase at cost from British Standards :

[ATTACH=CONFIG]235732[/ATTACH]

Or alternatively trust to contemporary RR material specs for nut metallurgy :

[ATTACH=CONFIG]235733[/ATTACH]

All this for one slotted nut ! You owe me a beer !
Ed