PDP-8 screws

[William Donzelli]

What is the thread? 6-32? 8-32?

--
Will

On Oct 26, 2018 8:44 PM, "Bob Rosenbloom via cctalk" <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
>
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