BAN020 semi light hex bolt+big washer 0,9mm

Nine tenths where the joint is to stay flat

An interesting combination: a value from the middle of the range, but in the version with a lowered top. It means a fairly large footprint on the surface and at the same time little height above it. That is exactly what a whole series of joints looks like on real machines, where the designer needed a wide mating surface but could not afford anything protruding into the path of a moving part.

Let us compare it with the value a tenth higher. The difference in diameter is slight and on its own it would be lost on a model, but with a lowered shape a second factor comes in: the ratio of height to width. The larger the diameter, the flatter the whole form looks, and from this point upward the head stops being a bold element and turns rather into a ring laid on top. Anyone who wants the anchoring still to be noticeable as a shape of its own should keep right here or lower.

Where it belongs

• lids and covers over which something slides or turns
• the fixing of sheet metal in places with limited build height
• areas by tanks and seats, where the surface is to be smooth
• models in 1:9 and 1:12 photographed close up

When seating it, watch mainly for the plane. A lowered shape forgives less than a tall head, because even a slight tilt is seen from the side as a light wedge under the rim. Check the part laid dry against the light, therefore, and only then add the glue. It also pays to clean the mating surface of any remaining sanding dust, which would create an invisible air gap under the wide ring.