Resonator thumbscrew/screw fixing, chrome, metric thread
These fixings are a type of machine screw that resembles the old "thumbscrew" but has a Philips screw recess in the head so that you can tighten it with a screwdriver rather than having to turn it by hand (although it's still possible to do it by hand if you prefer). These fixings vary a bit at the top (the upper parts varies between 12mm and 15mm long) but all have between 16mm - 18mm of thread (M4 x 0.7 pitch). These fixings fit any other wall lug with the same thread (M4 x 0.7) but it's as well to be aware that many of the older banjos of this general type have similar fixings with a different thread (M4 x 0.75 pitch) so they are not necessarily universally interchangeable, even if they look very similar.
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