Peculiar Britool spanner identification?

[Dragnet]

Labelled "Z5578-1.300 A/F". I guess some kind of 'special', but what's it for?

 

[Pete.]

I reckon that's a hose union spanner.

 

[500e]

Cant find it In 71 / 2008 / 2010 catalogues and nothing starting with a Z

 

[500e]

Reckon the Z is a Mil designation and not in general catalogue this is 1971

 

[James1979]

Bi hex spanner for an 1” bsp fitting at a guess.

If you wanted to move it on I’d be interested

 

[plewlandsbob]

1.3" ,works out at 33.02mm. That is the Metric equivalent , of a 3/4 whitworth , fitting or bolt.

1/2" BSP hydraulic fittings are usually 1and1/4" / 32mm

 

[James1979]

1.3" ,works out at 33.02mm. That is the Metric equivalent , of a 3/4 whitworth , fitting or bolt.

1/2" BSP hydraulic fittings are usually 1and1/4" / 32mm
View attachment 400225

You are correct. My early morning maths was right (1.3”) but wrong column on the chart.

If it’s not a BSP, what is it? I have a ground down 33mm I use regularly in spool blocks on haulers so offer stands, but I’m wondering what the fitting is now. JIC maybe. They’re like an inverse BSP?

Anyhoo it’s a 1.3”; 33mm bi hex flare spanner which looks like it’s to take a cheater pipe on the end?

 

[Dragnet]

Or is that 7/8" in small-head Whitworth?

Big fan of Whitworth. I'm trying to find a project I could use the 1 1/4"W spanner for I've got in the shed. BA might just shade it as my favourite thread.

Some good suggestions here. Three decimal places suggests accuracy was important. Some kind of MoD or other in-house use is indicated by the Z-code as per the G&M Tools link.

But what could use a Whitworth flare nut? Some kind of secret Cold War steam-tank project using leftover fittings after nationalisation?

 

[plewlandsbob]

I was thinking maybe, a hydraulic fitting on a plane , or a large threaded electrical connection / plug.

As an aside, on Manitou telehandlers, which are French built, the filler plugs , for transmission and the small gearbox, that splits the drive from the engine are 33mm/ 3/4W. The transmissions, were originally built in Birmingham, by,Turners Ltd.
And the bolt holes for holding on brake caliper, to transmission are1/2" UNC.
that soon teaches young lads to put everything, in a box,when dismantling, when they can't get a new bolt out of store!

 

[James1979]

I was thinking maybe, a hydraulic fitting on a plane , or a large threaded electrical connection / plug.

As an aside, on Manitou telehandlers, which are French built, the filler plugs , for transmission and the small gearbox, that splits the drive from the engine are 33mm/ 3/4W. The transmissions, were originally built in Birmingham, by,Turners Ltd.
And the bolt holes for holding on brake caliper, to transmission are1/2" UNC.
that soon teaches young lads to put everything, in a box,when dismantling, when they can't get a new bolt out of store!

The hydraulics on the creel haulers / mackerel strippers are French

 

[500e]

Would that finish be earlier than 50s most MOD was as it came

 

[Dragnet]

Weren't there Morris cars up to the '50s that used Whitworth heads on metric screws as they were made on French tooling but Morris didn't want to re-equip all the factories with metric spanners?