also see em in the audio world for rack mounting equipmednt On Sat, Oct 27, 2018 at 11:10 AM Adrian Stoness <[email protected]> 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 < > [email protected]> 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 >> >
