Thread size for PH 5C

[mbogo3]

Missing one small screw that holds the windage plate in the dovetail.Are these British threads? The rest is complete.....

 

[lefty]

There is a guy on e bay that sells pairs of original PH sight screws. He is in Great Britain but is cheap and ships quick.

 

[diopter]

That screw, on mine measures .092" across the threads and the closest I have on my thread guages is .5mm pitch, so figure about 48 to 52 TPI.( .5mm would be 50.79 TPI)

 

[diopter]

There is a guy on e bay that sells pairs of original PH sight screws. He is in Great Britain but is cheap and ships quick.

Must be:
http://www.customscrewsandmore.com/ProductsandServices.html

 

[Mike Webb]

Pretty sure they are British Association threads. 47.5 degree thread form (our Unified thread are 60 degree). They are designated 2BA etc. If you can get ahold of a Machinery Handbook not too hard to figure out the size of a threaded hole using the inside diameter as a guide.