Nut autopsy

[lampshuk]

OK, this might be going on a bit longer than anyone cares about, but the TD is definitely a maker's mark, just don't know which yet.

http://inox-world.com.au/technical_data/marking_of_stainless_screws_and_nuts/Marking/

It seems to be a common one, though.

Amazingly, you can buy a worldwide catalog of these from Amazon.
Also published by the US Department of defence, and the Illinois Department of Transportation.

And it gets even more complex. Apparently those little notches, random lines and other patterns that you see on the heads of bolts/machine screws actually mean something:
http://www.pinsdaddy.com/hex-nut-manufacturer-markings_Wvok*fHBMdsduMyYF7szXzOIpn*MP9UWLS6fkBNrF6g/

Enough of this! Must get back to work to be able to afford more expensive stainless steel fittings than I have been buying up to now!

 

[RichardS]

The nut is 24mm across the flats.

I have a section of the studding that was inserted, and which the new (bronze) nut fits, and can confirm that it is 16mm (well, 15.89) OD.
The thread pitch is 2mm (10 thread peaks in 20mm).

It sounds like you're saying that it's standard M16 2mm pitch + 24mm AF.

Richard

I think he is saying that Vyv was most likely correct in suggesting that it was originally 5/8" UNC

Ain't that the glory of the Forum. :encouragement:

Richard

 

[<152587>]

Measure the od of the thread on the shaft and the pitch with a pitch gauge consult the tables. Bobs yer uncle Fanny is yer Aunt.

 

[vyv_cox]

Measure the od of the thread on the shaft and the pitch with a pitch gauge consult the tables. Bobs yer uncle Fanny is yer Aunt.

Easy when you know. Many people younger than me (and you?) assume everything to be metric, not having been brought up with Imperial.

 

[Neeves]

Here we still need to know of Imperial.

I love blind rivets here - the diameter is metric and the length imperial (or the other way round). Bizarre.

We carry a full set of imperial and metric spanners and sockets (though I drew the line at both in long sockets and only have metric).

Jonathan

 

[DownWest]

Here we still need to know of Imperial.

I love blind rivets here - the diameter is metric and the length imperial (or the other way round). Bizarre.

We carry a full set of imperial and metric spanners and sockets (though I drew the line at both in long sockets and only have metric).

Jonathan

Probably something to do with the machines coming from UK originally. Same in Portugal. Water pipe was inch diameters, but metric lengths. Plywood is similar 8'by 4' but sold in metric.