Black steel double threaded union lock tube made to measure

15,7322,49 VAT incl

Customised black steel union nipple with BSP tapered double thread in two parts to close a perimeter or circumference.
Replaces conventional union fittingsthat are too large for discretion.


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A range of black steel bespoke BSP tapered threaded union nipples with two-part double threading to close a perimeter or circumference.
They are equipped with 2 hexagon socket set screws for N2,5 allen key.
Steel pipe unions are used to replace the classic union fittingss too large to be discreet.
Entirely handmade in our workshop.

Appearance of steel tubes

  • Standard: Smooth with a certain shine as it is raw steel. Depending on the manufacture, the colour can vary from light grey to black.
  • Shot-blasted:Uniform colour that is close to the umber grey "RAL7022" with slight nuances and a slight texture that blends perfectly with the colour of the plumbing fittings cast iron and shot blasted steel.

Our black steel tubes are manufactured to the following tolerances:

1/2″15mm +-1mm+-1mm
3/4″15mm +-1mm+-1mm
1″18mm +-1mm+-1mm
As they are raw steel there is a thin film of oil to protect them from corrosion.
This oil film can be removed with our metal cleaner or with any other degreaser (e.g. brake cleaner).
Then you can protect it with a aerosol varnish of a aerosol paint or with linseed oil baked into a very thin layer.
Feel free to read our FAQ.
Please note that during the production of the custom-made tubes 3 marks in the form of small dots of a length of +-4cm are visible due to the holding of the tube in the threading machine.
The black threaded steel pipes are designed to be screwed to any type of fittings Female in cast iron or steel of the same size.
You can then design furniture legs, tablesBookcases, shelves, to your measure for a perfect industrial decor.

Black steel double threaded custom made nipple tubes are welded steel tubes S195T medium iso according to DIN 10255 with a BSP tapered gas thread according to DIN EN 10226.


For more details you can read our FAQs

Thread type:

The thread is BSP (British Standard Pipe) Whitworth type.
The female thread type is BSPP DIN ISO 228-1 cylindrical and the male thread is BSPT DIN EN 10226 conical type formerly ISO 7-1.

Dimensions ND

Type of thread


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