It was crushed. I bought a suitable tube outer diameter 6 Φ, screw diameter R R1 / 8 because the light and compact one was good, but the part pinched by the spanner suddenly suddenly collapsed during tightening. It was my first experience so I did not know what happened for a moment but apparently it was too thin for the miniaturization and weight reduction so that the wall thickness was too thin and the rigidity was not enough and it was crushed by the tightening force In the normal type, the width of the two sides of the hexagonal part is 12 mm, while the width of the two sides of the mini type is 10 mm, it seems there was impossible to correspond to the 6 Φ tube, not glasses Even if you tighten it with an open ring, the eyeglasses will not enter because the tip part to be pushed when removing the tube is slightly larger than 10 mm. Perhaps I think that it is a problem only for this size item, but for people who give top priority to smallness and lightness, it may be a good item but please pay attention to the other persons, although we purchased 4 items, It is not even the amount of money, so the remaining three are likely to be bad inventory.
Removing the tube is also sure with a beautiful make. However, the material of the lock pin seems to be different from PC4 - M6, so it holds the tube firmly and hardly rotates in the lateral direction. I think that it is not suitable for this application because it requires rotation in the horizontal direction to use it for the model head part.
I used it as a substitute for a copper pipe fitting of a compressor Of course, although it is a one-touch and very convenient one, it is a question as to how much it can withstand 08 pressure, but now I can use it.