One union nut is attached to the each end of the pipes.
2.
The union is made up of three pieces : two union nuts and a ring, or coupling, nut.
3.
Upson Nut Company ( in 1864 it was called the Union Nut Company ) was a foremost maker of cold and hot pressed and forged nuts, bolts and washers.
4.
It featured the very first silver soldered boiler ( at the insistence of G & G ) and also had a steam pipe union nut at the boiler instead of the usual stop cock.
5.
Within the European Union NUTS ( Nomenclature of Territorial Units for Statistics ) system, Portugal is divided into seven regions : the Azores, Alentejo, Algarve, Norte, and with the exception of the Azores and Madeira, these NUTS areas are subdivided into 28 subregions.
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