Cooey 840 Front Bead

[jethunter]

What thread is the front bead sight on a Cooey M840 410 bore shotgun?

 

[jethunter]

The reason I ask is that none of the beads I have on hand fit; and I found two different part numbers online for m940 front beads: 12ga thru 28ga all use the same part# but 410 bore has a different part number. The description of these parts didn't include thread size.

 

[Mike Webb]

Just replaced one. Drilled out and tapped 6/48. Was smaller originally , I suspect 3/56 buti had no bead smaller than 6/48.

 

[jethunter]

Thanks

 

[gunrunner100]

... Was smaller originally , I suspect 3/56 buti had no bead smaller than 6/48.

Most likely this.