Fixing PCB standoffs without cabinet holes?

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Please check out these images of Lectron / Jean Maurer products, where the PCB and even the transformer are mounted inside, fixed to the relatively thin top plate but without holes comming through on the outside.

How is this done - does the technique have a name?
How much weight can be carried?

Thanx in advance
 

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Last edited by a moderator:
Could be spot welded studs - no holes, no re-finishing.
A sheet metal shop may be able to assist a home builder.
I did avoid visible screws on a front panel by laminating 2 metal panels with Araldite - screws were countersunk into one panel then covered by a second - the panel edge is a give-away though.
Tidy screwheads can give a professional (as opposed to consumer) look to equipment.
Alternatively go for the biggest screwheads you can find for a Steam Punk look!
 
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