Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
06-06-2019, 04:28 AM   #1
New Member




Join Date: Jun 2019
Posts: 3
Pentax Spotmatic missing screw

Hi all, I hope I'm posting in the right place. I've just discover one of the screws on the base plate of my Spotmatic is missing. Does anybody know what type of screw it is so I can source a replacement?

Attached Images
 
06-06-2019, 05:54 AM   #2
Forum Member




Join Date: Jan 2019
Posts: 65
Unscrew the second screw on the other side and measure it - diameter, length and thread pitch. Or take it with you for a sample, but not lose it.
And then we look for it, for example, in specialized stores or where repairs are made to the camera.
I would do that.

Last edited by Martin Stu; 06-06-2019 at 06:03 AM.
06-06-2019, 07:33 AM   #3
Site Supporter
Site Supporter




Join Date: Jun 2010
Location: Seaside CA
Posts: 510
It is a 2mm screw that is 3.5mm long. The service manual doesn't state the thread pitch but is is a common machine screw thread pitch.
06-06-2019, 09:02 AM   #4
New Member




Join Date: Jun 2019
Posts: 3
Original Poster
thanks for the pointers, I'll see what I can find

06-06-2019, 09:05 AM   #5
Otis Memorial Pentaxian
Loyal Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 32,666
It is unlikely that the existing cross-head screw is original, given that the screws flanking the tripod socket are slotted. I would not use it as an example for replacement.


Steve
06-06-2019, 09:17 AM   #6
Site Supporter
Site Supporter




Join Date: Jun 2010
Location: Seaside CA
Posts: 510
Pentax used cross point screws on later Spotmatics. The later screws are interchangeable with the older screws in the bottom cover. If you get a screw from a K1000 with a metal bottom cover, it will fit.
06-06-2019, 01:52 PM   #7
Otis Memorial Pentaxian
Loyal Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 32,666
QuoteOriginally posted by pentaxus Quote
Pentax used cross point screws on later Spotmatics. The later screws are interchangeable with the older screws in the bottom cover. If you get a screw from a K1000 with a metal bottom cover, it will fit.
Yes, Pentax moved to JIS in about 1970 and I have examples of both, but one does not typically see both types mixed on the same body. My caution regarding the cross point screw was that it may not be a good reference for diameter/length in that it was probably not original to the camera.


Steve
06-06-2019, 07:13 PM - 1 Like   #8
Moderator
Not a Number's Avatar

Join Date: Mar 2012
Location: Venice, CA
Posts: 5,918
I believe the screws should be counter sunk (tapered heads). Various service manuals show the screws to be chrome plated M2.0 × 3.5. Screws this small have a standard thread pitch so usually none is given.

Microfasteners has M2 × 3mm and M2 × 4mm. You could get the 4mm and file it down to 3.5mm
FMSP2004 - M2 x .4 x 4mm - Flat Head Machine Screws - Phillips - Stainless - Micro Fasteners
FMSP2003 - M2 x .4 x 3mm - Flat Head Machine Screws - Phillips - Stainless - Micro Fasteners

As does metricscrews (much less expensive)
https://www.metricscrews.us/index.php?main_page=product_info&cPath=98_5_24&products_id=32

http://www.pentax-manuals.com/manuals/service/servicemanuals.htm

Edit: the various Spotmatic parts lists refers to the screws as "saucer medium" which I take it are equivalent to pan head screws in which case any of these should do:
https://www.metricscrews.us/index.php?main_page=index&cPath=98_5_340

The screws on my Japan made K1000 are definitely countersunk.

Note: the screws by the tripod socket on the Spotmatics are m1.7 × 2.2


Last edited by Not a Number; 06-06-2019 at 07:43 PM.
06-12-2019, 01:36 AM   #9
New Member




Join Date: Jun 2019
Posts: 3
Original Poster
So an update, I measured the pitch at 0.4mm. I've just recieved some M2 X 3mm Slotted Countersunk Screws (DIN 963) - A2 Stainless Steel from Accuracy. Delivered. | 500,000+ Components | AccuŽ. Does the job but sits a little proud.
Attached Images
View Picture EXIF
IPhone 7 Plus  Photo 
06-12-2019, 08:39 AM   #10
Moderator
Not a Number's Avatar

Join Date: Mar 2012
Location: Venice, CA
Posts: 5,918
QuoteOriginally posted by chasinglemons Quote
So an update, I measured the pitch at 0.4mm. I've just recieved some M2 X 3mm Slotted Countersunk Screws (DIN 963) - A2 Stainless Steel from Accuracy. Delivered. | 500,000+ Components | AccuŽ. Does the job but sits a little proud.
Is the hole on the camera bottom countersunk (funnel shaped) or not? If not a pan or wafer head screw would probably be a better fit.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
baseplate, pentax service, pentax spotmatic, repair, screw, service, spotmatic, warranty
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
[Pentax MX] Screw specifications for "bottom main gear screw" papasouzas Pentax Film SLR Discussion 3 03-24-2019 11:25 AM
Where to buy a screw for Asahi Spotmatic? vyoufinder Repairs and Warranty Service 4 03-25-2018 08:36 PM
Missing screw. crayboy Pentax K-5 9 03-02-2018 10:44 AM
Repair Cost for DA15mm Missing Focusing Screw Halide Repairs and Warranty Service 6 10-28-2016 03:50 AM
Screw driven AF cameras. More high end = better screw drive? Reportage Pentax DSLR Discussion 13 09-01-2011 08:38 AM



All times are GMT -7. The time now is 06:24 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top