PDP-8 screws

[Bob Rosenbloom]

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

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