Re: PDP-8 screws
also see em in the audio world for rack mounting equipmednt
On Sat, Oct 27, 2018 at 11:10 AM Adrian Stoness
wrote:
> u can still get em see them on modern racks from time to time
>
> On Sat, Oct 27, 2018 at 11:07 AM Jon Elson via cctalk <
> cctalk@classiccmp.org> wrote:
>
>> On 10/26/2018 09:19 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 screws in 19" relay racks are almost all 10-32.
>> Flat-heads come in 60, 82, 90 and 110 degree angles. I'm
>> guessing these might be 82 degree, that is quite standard.
>> To avoid marring the panels, there were things that had a
>> nylon "washer" or ring that was capped by a metal "washer".
>> These both had an internal angle that matched the screw
>> angle. The metal washer was shorter than the nylon one, so
>> ONLY the nylon washer touched the panel. The metal washer
>> was to prevent the nylon one from being squashed by the
>> screw. I have NO IDEA where you would find these things
>> today, maybe they still make them. But, they used to be
>> quite common where equipment racks were used.
>>
>> Jon
>>
>
Re: PDP-8 screws
u can still get em see them on modern racks from time to time
On Sat, Oct 27, 2018 at 11:07 AM Jon Elson via cctalk
wrote:
> On 10/26/2018 09:19 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 screws in 19" relay racks are almost all 10-32.
> Flat-heads come in 60, 82, 90 and 110 degree angles. I'm
> guessing these might be 82 degree, that is quite standard.
> To avoid marring the panels, there were things that had a
> nylon "washer" or ring that was capped by a metal "washer".
> These both had an internal angle that matched the screw
> angle. The metal washer was shorter than the nylon one, so
> ONLY the nylon washer touched the panel. The metal washer
> was to prevent the nylon one from being squashed by the
> screw. I have NO IDEA where you would find these things
> today, maybe they still make them. But, they used to be
> quite common where equipment racks were used.
>
> Jon
>
Re: PDP-8 screws
On 10/26/2018 09:19 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 screws in 19" relay racks are almost all 10-32.
Flat-heads come in 60, 82, 90 and 110 degree angles. I'm
guessing these might be 82 degree, that is quite standard.
To avoid marring the panels, there were things that had a
nylon "washer" or ring that was capped by a metal "washer".
These both had an internal angle that matched the screw
angle. The metal washer was shorter than the nylon one, so
ONLY the nylon washer touched the panel. The metal washer
was to prevent the nylon one from being squashed by the
screw. I have NO IDEA where you would find these things
today, maybe they still make them. But, they used to be
quite common where equipment racks were used.
Jon
Re: PDP-8 screws
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"
mailto:cctalk@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
www.dvq.com
www.tekmuseum.com
www.decmuseum.org
--
Vintage computers and electronics
www.dvq.com
www.tekmuseum.com
www.decmuseum.org
Re: PDP-8 screws
What is the thread? 6-32? 8-32?
--
Will
On Oct 26, 2018 8:44 PM, "Bob Rosenbloom via cctalk"
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
> www.dvq.com
> www.tekmuseum.com
> www.decmuseum.org
>
>
Re: PDP-8 screws
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
www.dvq.com
www.tekmuseum.com
www.decmuseum.org
Re: PDP-8 screws
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
--
Vintage computers and electronics
www.dvq.com
www.tekmuseum.com
www.decmuseum.org
Re: PDP-8 screws
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.
Re: PDP-8 screws
should be a standard rack screw i would think
On Fri, Oct 26, 2018 at 2:22 PM William Donzelli via cctalk <
cctalk@classiccmp.org> wrote:
> 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?
>
> Thank you.
>
> --
> Will
>
PDP-8 screws
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?
Thank you.
--
Will
