Where to find an unusual screw

[bones92]

I have one of the replica flintlock pistols (.69 cal) made or imported by EIG.  The frizzen screw had the threads worn down, and I noticed that the frizzen hinge screw was the same diameter and pitch, so I took measurements.

What I need is a fillister head screw:   0.75 pitch,  3.85mm shaft diameter,  ~9.5mm shaft length (not including head)

Where can I find this?  Or would someone on this forum be willing to make one for a fee?

Thanks!

[grabenkater]

Friend of mine ran into this problem with an Italian made flintlock. He went to Lowes and bought a tap and tapped it to a common screw size. He even bought the screw at Lowes and turned the head down by putting it in his drill press and using a file. Then he stripped the coating and browned it to match.

[Nate McKenzie]

If its metric, a good hardware store should have one that will work.  They should even have a try board with different threads.

[L. Akers]

You are really close to a standard #8 screw.  I think I'd retap to a standard #8 size and get a screw from a ML supplier.  The trouble with hardware store screws is the body is fully threaded.

[bones92]

I don't know if I can go any larger on diameter (of the screw shaft), since this must fit through the frizzen spring.

[Clark Badgett]

Are you sure that it's not an M4-.7 bolt?

[Bob Roller]

I don't know if I can go any larger on diameter (of the screw shaft), since this must fit through the frizzen spring.

Take the spring AND lock to a hardware store IF you can find one. They are vanishing from
the American scene. Try a #8 screw thru the hole in the spring and also a 4MM.See if either will
work with the threads in the lock plate. If the #8 will work then retap the hole to 8x32 if the plate
isn't hard. WHAT is the diameter of the head?

Bob Roller

[bones92]

At first, I thought it was a 0.80 thread pitch, but checked the 0.75 to be sure.  The crests of the threads seem to align perfectly on 0.75, though 0.80 was really close, too.

The good thing is that there's only a few millimeters of threads in the lock plate.  I half expect an 0.8 might actually work, too.

Would an M4 screw be the right diameter on the shank (i.e., around 3.85mm)?    I didn't measure the fillister head, as I didn't think it mattered.

On a related note, how should I compress the frizzen spring to allow the screw to be turned in straight and true?  Will a mainspring clamp work in this application?   The link here shows the same style pistol that I have... https://www.gunsamerica.com/935783904/British-Sea-Service-Flintlock-pistol.htm

Another view: link removed by moderator Rich Pierce as it was making the page 100 yards wide

[mark esterly]

make one of these  http://img.photobucket.com/albums/v338/Birddog6/Building%20Photos/Dsc09525.jpg

[garra]

I have some screws that are close.  I retreaded it to .75 pitch from where it was.  It is a 4mm screw,  but the diameter is 3.59mm with a length of 9.68mm.  Your diameter of 3.85mm makes me believe it is a 4.5mm screw.  This one has full length treads.

Are you looking for one with a smooth surface under the frizzen, with threads on the very end. 

[Hungry Horse]

Bore it out, and tap it, to an American thread,and be done with it. 

   Hungry Horse

[Don Stith]

Am I out of date again?
  I thought EIG was a belgium proof stamp not an importer

[rich pierce]

Bones92, good luck with your pistol.  Hope you don't mind my modifying one of your posts as it was making the whole thread super wide and responses hard to read.

[Ky-Flinter]

Please limit your replies to the original topic question.  If your reply has nothing to do with locating or making a suitable replacement part, then don't post it.  Thanks.

-Ron
on behalf of the ALR moderators.

[bones92]

Garra, PM sent!


What would be an ideal tap size to use, should I decide to rethread it?