Anyone know the size of the grounding screws used to fasten the boards on a Williams IJ? Specifically after the screws with the locking washer used to ground the main CPU board but I think all the screws used in the back box might be the same size? Are they the 6-32 x 1/4 with locking washer screws? Thanks.They are 8-32 x 1/2" SEMS screws with external lock washers; 3/8" might work, 1/4" is too short to hold the boards securely. Original part number 4008-01017-08, substitute 4008-01003-08.
On Saturday, July 11, 2020 at 10:05:04 PM UTC-4, Dave wrote:I would add to Tony's comment that in restoring many Williams WPC games, I have found the threads in the backbox metal shielding plate these screws go into are often stripped. This causes you to look for larger screws but they won't fit if you go one size up with machine threaded screws. It isn't a purist solution, but I've substituted sheet metal screws of the same size with success.
Anyone know the size of the grounding screws used to fasten the boards on a Williams IJ? Specifically after the screws with the locking washer used to ground the main CPU board but I think all the screws used in the back box might be the same size? Are they the 6-32 x 1/4 with locking washer screws? Thanks.
They are 8-32 x 1/2" SEMS screws with external lock washers; 3/8" might work, 1/4" is too short to hold the boards securely. Original part number 4008-01017-08, substitute 4008-01003-08.
Joseph "Tony" Dziedzic
Anyone know the size of the grounding screws used to fasten the boards on a Williams IJ? Specifically after the screws with the locking washer used to ground the main CPU board but I think all the screws used in the back box might be the same size? Are they the 6-32 x 1/4 with locking washer screws? Thanks.Bolt Max sells the correct screws in a bag of 100 for just $5.15 https://www.boltmax.com/proddetail.php?prod=593194
On Saturday, July 11, 2020 at 7:05:04 PM UTC-7, Dave wrote:
Anyone know the size of the grounding screws used to fasten thea Williams IJ? Specifically after the screws with the locking washer
boards on
used to ground the main CPU board but I think all the screws used in
the back box might be the same size? Are they the 6-32 x 1/4 with
locking washer screws? Thanks.
Bolt Max sells the correct screws in a bag of 100 for just $5.15
https://www.boltmax.com/proddetail.php?prod=593194
Ken Layton <KLayton888@aol.com> wrote in news:f15d6cc4-fa42-4ee8-883f-28e6b0c8663ao@googlegroups.com:
On Saturday, July 11, 2020 at 7:05:04 PM UTC-7, Dave wrote:
Anyone know the size of the grounding screws used to fasten thea Williams IJ? Specifically after the screws with the locking washer
boards on
used to ground the main CPU board but I think all the screws used in
the back box might be the same size? Are they the 6-32 x 1/4 with
locking washer screws? Thanks.
Bolt Max sells the correct screws in a bag of 100 for just $5.15
https://www.boltmax.com/proddetail.php?prod=593194
The description in your link saysThe picture they posted on their website is wrong. The screws at that link actually are indeed external tooth lockwashers and I have ordered thousands of those screws from them. I use them also on Data East and Williams system 11 games. On system 11 machines the factory had a tendency to overtighten the screws and strip the threads of the screws. That's why any system 11 machine I work on gets all new board mounting screws that I hand tighten with a screwdriver and not a screw gun.
"8-32 x 1/2 Ext Tooth Lockwasher Screw Pan Head Phillips Z/P 100ct"
The picture shown is one with INTERNAL lockwashers. https://www.boltmax.com/images0/593.png
You can make your own SEMS Screws with attached washers by forcing
a smaller lock washer onto the screw.
Use 8/32 screws and a 6/32 washer.
Use a screw driver and pliers to hold the washer
whlie screwing the screw through the washer.
Or just buy separate washers and screws.
On Monday, July 13, 2020 at 11:00:56 PM UTC-7, flippy wrote:
Ken Layton <KLayton888@aol.com> wrote in
news:f15d6cc4-fa42-4ee8-883f-28e6b0c8663ao@googlegroups.com:
On Saturday, July 11, 2020 at 7:05:04 PM UTC-7, Dave wrote:
Anyone know the size of the grounding screws used to fasten thea Williams IJ? Specifically after the screws with the locking washer
boards on
used to ground the main CPU board but I think all the screws used in
the back box might be the same size? Are they the 6-32 x 1/4 with
locking washer screws? Thanks.
Bolt Max sells the correct screws in a bag of 100 for just $5.15
https://www.boltmax.com/proddetail.php?prod=593194
The description in your link says
"8-32 x 1/2 Ext Tooth Lockwasher Screw Pan Head Phillips Z/P 100ct"
The picture shown is one with INTERNAL lockwashers.
https://www.boltmax.com/images0/593.png
You can make your own SEMS Screws with attached washers by forcing
a smaller lock washer onto the screw.
Use 8/32 screws and a 6/32 washer.
Use a screw driver and pliers to hold the washer
whlie screwing the screw through the washer.
Or just buy separate washers and screws.
The picture they posted on their website is wrong. The screws at that link actually are indeed external tooth lockwashers and I have ordered thousands of those screws from them. I use them also on Data East and Williams system 11 games. On system 11 machines the factory had a tendency to overtighten the screws and strip the threads of the screws. That's why any system 11 machine I work on gets all new board mounting screws that I hand tighten with a screwdriver and not a screw gun.
On 2020/07/14 8:20 a.m., Ken Layton wrote:
On Monday, July 13, 2020 at 11:00:56 PM UTC-7, flippy wrote:
Ken Layton <KLayton888@aol.com> wrote in
news:f15d6cc4-fa42-4ee8-883f-28e6b0c8663ao@googlegroups.com:
On Saturday, July 11, 2020 at 7:05:04 PM UTC-7, Dave wrote:
Anyone know the size of the grounding screws used to fasten thea Williams IJ? Specifically after the screws with the locking washer >>> used to ground the main CPU board but I think all the screws used in >>> the back box might be the same size? Are they the 6-32 x 1/4 with
boards on
locking washer screws? Thanks.
Bolt Max sells the correct screws in a bag of 100 for just $5.15
https://www.boltmax.com/proddetail.php?prod=593194
The description in your link says
"8-32 x 1/2 Ext Tooth Lockwasher Screw Pan Head Phillips Z/P 100ct"
The picture shown is one with INTERNAL lockwashers.
https://www.boltmax.com/images0/593.png
You can make your own SEMS Screws with attached washers by forcing
a smaller lock washer onto the screw.
Use 8/32 screws and a 6/32 washer.
Use a screw driver and pliers to hold the washer
whlie screwing the screw through the washer.
Or just buy separate washers and screws.
The picture they posted on their website is wrong. The screws at that link actually are indeed external tooth lockwashers and I have ordered thousands of those screws from them. I use them also on Data East and Williams system 11 games. On system 11 machines the factory had a tendency to overtighten the screws and strip the threads of the screws. That's why any system 11 machine I work on gets all new board mounting screws that I hand tighten with a screwdriver and not a screw gun.
Hey Ken, did you ever find replacement standoff 'nuts' - those odd metal--- Synchronet 3.18a-Win32 NewsLink 1.113
U shaped clips that Williams used for their PCB mounts? Not that I have spent much time looking, but they would be handy to stock...
John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
8-32 1/2" SEMS ... Hmmm
Wondering if these will work for Data East/Sega games and System 11.
I would think so.
Always missing screws on DataEast boards since you have to take out completely and can easily drop some. Wms Sys11 too, actually.
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