My experience was that the Harwin pins did not do an especially nice job.

You can buy rivets made for the job (or repurposed?)

UK - down to 0.6mm OD

      https://www.megauk.com/through_hole_rivets.php

________


http://www.ebay.com/itm/20-Copper-Via-Vias-Plated-Through-Hole-Rivets-Hollo=
w-Grommets-PCB-Circuit-Board-/280751380393

Same

http://uniquesalesonline.com/size-7-pcb-vias-circuit-board-plated-through-h=
oles



The smallest ones below have a 0.9mm OD barrel.
I saw some advertised a few days ago with 0.8mm OD barrel.

They say

7 Types Available;
1.  Head Diameter: 1.8mm - Outside Diameter: 0.9mm - Length: 2.9mm - Inside
Diameter: 0.58mm
2.  Head Diameter: 2.3mm - Outside Diameter: 1.2mm - Length: 3mm - Inside
Diameter: 0.88mm
3.  Head Diameter: 2.5mm - Outside Diameter: 1.5mm - Length: 3mm - Inside
Diameter: 1.1mm
4.  Head Diameter: 3mm - Outside Diameter: 1.7mm - Length: 3mm - Inside
Diameter: 1.2mm
5.  Head Diameter: 3mm - Outside Diameter: 1.8mm - Length: 3.5mm - Inside
Diameter: 1.4mm
6.  Head Diameter: 2.8mm - Outside Diameter: 1.5mm - Length: 6mm - Inside
Diameter: 1.1mm
7.  Head Diameter: 3.5mm - Outside Diameter: 2mm - Length: 5mm - Inside
Diameter: 1.5mm

Good discussion here:

http://electronics.stackexchange.com/questions/22001/plated-through-hole-at=
-home

DIY real through hole plating
Video
http://www.youtube.com/watch?v=3DfY0AjzKLA-8&feature=3Dyoutu.be

DIY
text

http://www.thinktink.com/stack/volumes/VOLVI/copplate.htm


      Russell
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