Spotmatic part needed

Gerry M · May 31, 2018

Does anyone have a spare screw for the bottom plate of a Spotmatic? I think it is the same as the lens mount screws.

Thanks,

Gerry

Helios 1984 · May 31, 2018

Lens mount screws will hold the bottom plate for sure, but the heads won't be flush.

shutterfinger · May 31, 2018

http://metricscrews.us/
measure the outside diameter of an existing screw, the distance between thread peaks or valley centers, and the length all in millimeters.

Gerry M · May 31, 2018

Helios 1984 said:
Lens mount screws will hold the bottom plate for sure, but the heads won't be flush.

To try, I swapped one of my lens mount screw and it fit perfectly. It has a countersunk head as your example on the right. That's the one I need.

gm

Gerry M · May 31, 2018

shutterfinger said:
http://metricscrews.us/
measure the outside diameter of an existing screw, the distance between thread peaks or valley centers, and the length all in millimeters.

It is much too small for me to measure diameter or thread pitch. I can barely hold it on the end of a jewelers phillips head. Tiny little thing.

gm

Helios 1984 · May 31, 2018

I assumed that Pentax parts were standardized. My bad.

I counted 9 thread per 1/8 inch which translate by 28.57 thread per CM, according to this chart and the diameter is 1.5MM.

Gerry M · May 31, 2018

^^ Thank you!!

Helios 1984 · May 31, 2018

If someone else could confirm, it would be nice. Tiny little things heh

shutterfinger · May 31, 2018

http://www.pentax-manuals.com/manuals/service/servicemanuals.htm
the service manual shows 1.7 x 2.2 for the center, 2.0 x 3.5 for the end.
Forgot I had downloaded them.
P.S.
There is only one thread pitch for metric screws that small.

Gerry M · Jun 1, 2018

Donors have been offered. Thanks to all for your help.

AgX · Jun 1, 2018

If you come across some battered camera of any japanese make for little money, get it for salvaging, it will bring up at least one screw you will need one day...

paul ron · Jun 1, 2018

AgX said:
If you come across some battered camera of any japanese make for little money, get it for salvaging, it will bring up at least one screw you will need one day...

hahahaha and after 50 years, ive got buckets full! problem is, i use alot less than i collected.

AgX · Jun 1, 2018

"One day I shall need it", the dogma of any hoarder.

Spotmatic part needed

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