What size nut?

[Leakylunar]

Just selecting gear for solar and noticed my battery has threaded post I could connect to , does anyone know what size they might be?

 

[tonyidle]

Just selecting gear for solar and noticed my battery has threaded post I could connect to , does anyone know what size they might be?

M6 or 8 at a guess.

 

[Two on Tour]

They are normally 5/16 whitworth, well they were on the Numax leisure batteries I had before fitting the lithium.

 

[Stealaway]

They are normally 5/16 whitworth, well they were on the Numax leisure batteries I had before fitting the lithium.

Well I suppose they are a British Battery . Are they still using up old stock?
They can't still be ordering british threads on their posts connections --- or is it just tradition?

 

[nicholsong]

Well I suppose they are a British Battery . Are they still using up old stock?
They can't still be ordering british threads on their posts connections --- or is it just tradition?

Might be, just like a lot of gas fittings in Europe are still Imperial, at least they are in Greece.

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[gus-lopez]

M6 normally & requires a 10mm socket/spanner.

 

[thebriars]

They are normally 5/16 whitworth, well they were on the Numax leisure batteries I had before fitting the lithium.

The Numax I had with both posts and threaded terminals was metric, M 8 I believe.

 

[Two on Tour]

M6 normally & requires a 10mm socket/spanner.

https://www.motorhomefun.co.uk/forum/threads/numax-terminal-thread-size-please.38015/

https://www.caravantalk.co.uk/community/topic/47809-numax-battery/

https://en.wikipedia.org/wiki/Battery_terminal

whitworth and UNC are very close on diameter and thread pitch.

Popcorn time I it would seem.

 

[tonyidle]

Might be, just like a lot of gas fittings in Europe are still Imperial, at least they are in Greece.

"Our" pipe threads were adopted by most European countries back when Adam was a lad (and when everything else they used was Metric).

 

[Vipar]

Just another bit of useless information
5/16 is the same thread on photographic tripods

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[nicholsong]

"Our" pipe threads were adopted by most European countries back when Adam was a lad (and when everything else they used was Metric).

Reason?

Was it because UK was ahead in installing 'town gas', so appliances were being exported from UK?

 

[tonyidle]

Reason?

Was it because UK was ahead in installing 'town gas', so appliances were being exported from UK?

I don't know - but it will be for some reason like the one you suggest. The Whitworth thread form on which BSP is based was a British standard at the start of the Industrial Revolution so I suspect we were exporting something that led the way.

 

[pappajohn]

now go to a high street hardware shop and ask for a Whitworth nut.
They probably need cheering up.

 

[Stealaway]

now go to a high street hardware shop and ask for a Whitworth nut.
They probably need cheering up.

Or a Whitworth spanner.

 

[Two on Tour]

As usual, plenty of both whitworth nuts and spanners on your favorite auction site.

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[SuperMike]

Do model makers still use BA threads?
14BA anyone.

 

[Richard n Ann]

I wondered why the Spanish taps have BSP hose threads. Now I know ?

 

[TheBig1]

we have an old hardware shop in town still with shelves full of dusty old boxes. It's rare that they don't have what you need in new old stock

 

[Leakylunar]

Thanks I’ll pop tomorrow for unc/whitworth I’ll have metric in a drawer??

 

[jockaneezer]

Just another bit of useless information
5/16 is the same thread on photographic tripods

I thought tripods and cameras were 1/4" Whitworth thread ?

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[Spriddler]

Or a Whitworth spanner.

A metric adjustable will fit.

 

[SuperMike]

A metric adjustable will fit.

An adjustable spanner !!!! My daddy will be turning.

 

[autorouter]

Don't dismiss the possibility it might still be metric. There's metric coarse and metric fine threads, same diameter but different thread pitch. If it's softer metal, as on a battery terminal, they will use a coarse thread.

 

[MikeD]

Just another bit of useless information
5/16 is the same thread on photographic tripods

I thought 3/8" or a 1/4" are the usual sizes. I have never seen a 5/16 fitting.

 

[Stealaway]

A metric adjustable will fit.

It has to be an imperial adjustable - silly boy???

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[mitzimad]

Might be, just like a lot of gas fittings in Europe are still Imperial, at least they are in Greece.

Pipe threads are imperial every whereseems no one uses metric

 

[Two on Tour]

If it's softer metal, as on a battery terminal, they will use a coarse thread.

The OP is referring to the dual post type.

 

[Spriddler]

A sparkling plug spanner is still included in m/bike tool kits. Not only did plugs need regular attention in early days due to poor petrol and basic oils but the only metric thread on Brit bikes and cars was the sparkling plug, requiring a metric spanner, since (arguably) the first plug was invented and produced in France in 1860 by Etienne Lenoir, where metric threads were the norm.

 

[the1andonly]

Restoring early motor vehicles can be a thread nightmare, eg early twin Nortons had a Peugeot engine(french) , the nuts and bolts were made from whitworth bar stock with metric thread. Standardization has always been difficult. In cycles (push bikes) road machines were stanadardised metric@ 700mm diameter. Mountain bikes @ 26 inches, a new improved size was introduced 29er, the a compromise better size of 27 and a half was introduced. What size is this half way house: 650mm. Even the yanks are slowly being metrificated. Mind you they did wanted to change the number of ml in a litre to 800. ( think fluid ounces)

 

[G-RMPS]

The plane I built is an American kit. All nuts/bolts in the structure and controls are imperial. The engine is made in Austria and is metric. The accessories such as radiators have converters to move from metric to imperial. So I needed an imperial AND a metric adjustable spanner ;-)

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