Omark screw threads

ADDS222 · Post by **ADDS222** » Fri Mar 21, 2008 9:16 pm

Hi all! Can anyone tell me what screws should be used for scope mounting on the Omark action? I have been told that they are 6-48 gauge. So i brought some from Peter at Procal but these screws are way too small! M4x0.7 metric ones are close but also too small. So i dont know what they are! Can some one tell me what thread the original Omark tapping is? Or better still help me out with the correct screws??

trxdick · Post by **trxdick** » Sat Mar 22, 2008 11:09 pm

I fitted a scope rail to my Omark and found that a 6-32 UNC worked OK with a drop of blue loctite in the existing rear hole. I drilled and tapped 6-48 for the front holes for use with a B-Square scope base. Yours may be drilled and tapped something different so you will have to experiment to see what fits.
Cheers,
Richard

stu_bear2002 · Post by **stu_bear2002** » Sat Mar 22, 2008 11:19 pm

gday adds, you may well find that the holes are tapped for the 8x47 screws as an old parker hale i had was tapped for these, plenty of gunshops will have a few of these lying around, if you take the rifle with you they could find the right screws for you.
stuey

Malcolm Hill · Post by **Malcolm Hill** » Sun Mar 23, 2008 7:03 am

Hi ADDS Most of the threaded rear holes in Omark actions are 5/32 whitworth although I have heard some of the late actions had a different size. 5/32 B.S.W. screws of decent quality with allen heads are not easy to find so tap that hole out to 8-40,the rest can be drilled and tapped to 6-48.Hope this helps Regards Malcolm

ADDS222 · Post by **ADDS222** » Fri Apr 11, 2008 1:24 pm

thanx for great advice guys! worked out the threads for scope mount are 8G x 40

Omark screw threads

Omark screw threads

Omark threads