Re: C64/VIC shell screw sizes

From: Marko Mäkelä <>
Date: Fri, 20 Jan 2012 09:53:36 +0200
Message-ID: <20120120075336.GA2707@x60s>
On Fri, Jan 20, 2012 at 12:35:26AM +0100, Rob Clarke wrote:
>One observation is that a thread length of 9.5 mm is too long for 
>holding the MB to the bottom shell on the 64 & plus/4. It noticeably 
>deforms the plastic on the underside of the shell. Having looked at the 
>alternatives, 6.5mm screws seem to be the next smallest standard size 

Right. In the breadbox Vic-20 and C64, the motherboard screws are 
shorter than the 3 case screws. I have come across some C64s where 
someone had apparently used the too long case screws to attach the 

>There is now a DIN and ISO standard for the type of screws required; 
>DIN 7981 / ISO 7049 which defines standards for 'Cross Recessed Pan 
>Head Tapping Screws' - nice!

If ISO assigns the numbers in chronological order, 7049 could have 
existed back then. For example, ISO 8859-1 (the 8-bit character standard 
known as Latin-1) was first published in 1985 or so.  (It was chosen for 
the Commodore Amiga.  It is based on the DEC Multilingual character set 
found in the VT-220.  Microsoft embraced and extended it as Code Page 
1252. Now it is finally on the way to extinction, superceded by UTF-8.)


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Received on 2012-01-20 08:00:03

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