STAUFF® 106.4-PP Polypropylene Clamp Body to suit 6.35mm 1/4" diameter tubes.  These are ideal as Yagi Antenna insulators when using 6.35mm 1/4" diameter aluminium tube.   These clamps when tightened to an aluminium boom using a M6 Hex screw and rivet nut are extremely strong and will not rotate on the boom.

6.35x1.42mm 1/4" diameter aluminium tube part# UA1924 is available as stock item in most Australian cities from Ullrich Aluminium

Use the HS-M6x30-SS Hex Socket screws and N-M6-RIVET-SS Rivet Nuts with these clamps for mounting to a square aluminium boom.

We can generally supply these in higher quantities than stocked in around 3 days POA