Spotmatic part needed

[Gerry M]

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]

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

 

[shutterfinger]

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]

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]

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]

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]

^^ Thank you!!

 

[Helios 1984]

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

 

[shutterfinger]

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]

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

 

[AgX]

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]

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]

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