D-Sub Jackscrews on Amiga ports!

BarryB · 29 October 2014, 14:04

Are they the #4-40 UNC variety? Equates to M3 x 0.5 and about 7mm (0.275") screw length.

Ordered 50 off ebay for about £6, believe they are the right ones but may as well ask

ajk · 29 October 2014, 14:05

There are (at least) two different types. Some use M3 threads and others use something else, perhaps the UNC you mention.

BarryB · 29 October 2014, 15:03

Forgot to mention these are for an A1200

ajk · 29 October 2014, 15:14

Different connectors on the same board may have different screws... at least on my A600 I had to put them back in the right order or they didn't fit

Some had a finer thread and some a more coarse one.

BarryB · 29 October 2014, 16:13

The ones on this board all seem to take the same type. I have some thread gauges somewhere but as usual they've gone missing

I would think they should be the same as the ones on PC connectors, VGA, Serial, Parallel etc!

Found an A500 Plus service manual and it just refers to them as Item 32, Part 390251-01, Desc JACKPOST STANDOFF, some help that was!!

bdb · 29 October 2014, 18:44

ajk is correct, there are two different sizes used to achieve the same purpose. I assume different manufacturers use different threads.

BarryB · 29 October 2014, 20:06

I stumbled on this conversion table: http://www.trfastenings.com/pages/Th...version+Tables

Looking across it reads as though M3 x 0.5 is equal to 4-40 UNC, but as you say, it all depends on what was used on this A1200 1D4 board I have. I'll find out soon enough when those standoffs arrive.

BarryB · 01 November 2014, 13:07

And they have arrived!

On the LEFT are the ones I just bought and on the RIGHT are the ones from the MOUSE port (attached via ribbon cable) which, as you can see, uses a finer pitch on the thread! ALL PORTS use this thread as I've screwed the same screw into all the ports and they tighten up!

Eye sighting them with a rule shows them to be M3 x 0.5mm, so on this 1D4 board all the ports look to use M3 x 0.5mm, they are NOT #4-40 UNC!!

29 October 2014, 14:04	#1
BarryB Amigaholic Join Date: Dec 2009 Location: UK Posts: 4,716	D-Sub Jackscrews on Amiga ports! Are they the #4-40 UNC variety? Equates to M3 x 0.5 and about 7mm (0.275") screw length. Ordered 50 off ebay for about £6, believe they are the right ones but may as well ask

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Worst Amiga Ports	Hewitson	Nostalgia & memories	126	23 August 2022 21:24
Brand New 2x Amiga Joy ports to PC adapter (USB)	lesta_smsc	support.Hardware	13	16 July 2012 15:35
Looking for Amiga ports	pce_gamer	Retrogaming General Discussion	2	17 February 2009 19:49
Descent - and other nineties Amiga ports	Angus	support.Games	0	10 October 2008 12:37
Amiga Explorer and Serial PC ports?	chaoticjelly	support.Hardware	1	12 June 2005 16:46

29 October 2014, 14:05	#2
ajk Registered User Join Date: May 2010 Location: Helsinki, Finland Posts: 1,341	There are (at least) two different types. Some use M3 threads and others use something else, perhaps the UNC you mention.

29 October 2014, 15:03	#3
BarryB Amigaholic Join Date: Dec 2009 Location: UK Posts: 4,716	Forgot to mention these are for an A1200

29 October 2014, 15:14	#4
ajk Registered User Join Date: May 2010 Location: Helsinki, Finland Posts: 1,341	Different connectors on the same board may have different screws... at least on my A600 I had to put them back in the right order or they didn't fit Some had a finer thread and some a more coarse one.

29 October 2014, 16:13	#5
BarryB Amigaholic Join Date: Dec 2009 Location: UK Posts: 4,716	The ones on this board all seem to take the same type. I have some thread gauges somewhere but as usual they've gone missing I would think they should be the same as the ones on PC connectors, VGA, Serial, Parallel etc! Found an A500 Plus service manual and it just refers to them as Item 32, Part 390251-01, Desc JACKPOST STANDOFF, some help that was!!

29 October 2014, 18:44	#6
bdb Registered User Join Date: Jul 2012 Location: USA Posts: 239	ajk is correct, there are two different sizes used to achieve the same purpose. I assume different manufacturers use different threads.

29 October 2014, 20:06	#7
BarryB Amigaholic Join Date: Dec 2009 Location: UK Posts: 4,716	I stumbled on this conversion table: http://www.trfastenings.com/pages/Th...version+Tables Looking across it reads as though M3 x 0.5 is equal to 4-40 UNC, but as you say, it all depends on what was used on this A1200 1D4 board I have. I'll find out soon enough when those standoffs arrive.

01 November 2014, 13:07	#8
BarryB Amigaholic Join Date: Dec 2009 Location: UK Posts: 4,716	And they have arrived! On the LEFT are the ones I just bought and on the RIGHT are the ones from the MOUSE port (attached via ribbon cable) which, as you can see, uses a finer pitch on the thread! ALL PORTS use this thread as I've screwed the same screw into all the ports and they tighten up! Eye sighting them with a rule shows them to be M3 x 0.5mm, so on this 1D4 board all the ports look to use M3 x 0.5mm, they are NOT #4-40 UNC!!

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)