PDP-8 screws

[Bob Rosenbloom]

On 10/26/2018 8:04 PM, William Donzelli wrote:
> What is the thread? 6-32? 8-32?
>
> --
> Will


Thread is 6-32.

Bob

>
> On Oct 26, 2018 8:44 PM, "Bob Rosenbloom via cctalk" 
> <cctalk at classiccmp.org <mailto:cctalk at classiccmp.org>> wrote:
>
>     On 10/26/2018 7:41 PM, Bob Rosenbloom via cctalk wrote:
>
>         On 10/26/2018 7:19 PM, Steve Malikoff via cctalk wrote:
>
>             William said
>
>                 One the original PDP-8 ("Straight 8"), the front panel
>                 has two aluminum
>                 strips on the sides, one on the left and one on the
>                 right. Each should have
>                 a pair of flathead countersunk screws, likwly Phillips
>                 head.
>
>                 Can someone tell me the exact specs, basically thread,
>                 length, head, and
>                 material of the screws?
>
>
>             I have no idea what the straight eight screws are, but for
>             comparison the sort of screws in
>             the PDP-11/05 are things like #6-32 x 1/2 phillips pan
>             head, #10-32 x 5/16 phillips head truss,
>             #8-32 x 3/8 phillips pan head nyloc, #2-56 x 1/2 phillips
>             pan head, #4-40 x 3/8 phillips head
>             flat. And so on it goes.
>
>             I read somewhere DEC used a lot of stainless screws but
>             that may not apply to all of them.
>             Certainly the cheese head screws that the 11/15's 10-1/2"
>             chassis pivots on are stainless, I
>             checked that for curiosity's sake when I machined some
>             special adapter washers to use with
>             modern server slides.
>
>             At any rate, you have that wondrous (but US only) fastener
>             supplier's website to help you out.
>
>             Steve.
>
>
>         I have four straight-8 panels. All have flat head, stainless
>         (at least non-magnetic) screws. Three have Philips head screws
>         and one has slotted head screws. All are 0.38" total length
>         with about 0.28" thread length. Looks to be an 82 degree
>         countersink.
>
>         Bob
>
>     I just noticed the three Philips head panels have the plastic
>     front, my only glass front has the slotted screws.
>
>     Bob
>
>     -- 
>     Vintage computers and electronics
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>

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