Front bead sight threads

atlantadad · December 26, 2004, 05:29 PM

Anyone know what the thread/pitch is for a EAA 20 Gauge and Lamber 12 Gauge O/U front sights are?
Need to replace our fiber sights with traditional ones.
Thanks.

Danindetroit · December 26, 2004, 07:37 PM

home depots, usually have a block with threaded holes to test with. You can also go to a good hardware store, and test with nuts. I think those being European, they are going to be close to 3mm x .5. or .6. If they are metric, you can re-tap with a bottom tap to #4-48", or have a gunsmith do it. You might have to use a drill to drill out enough material, or the tap might break.

HunterTRW · December 26, 2004, 08:02 PM

Try posting your questions in The Firing Line's "The Smithy" Forum. One of the gunsmiths there should be able to answer them.

Rob62 · December 29, 2004, 09:05 PM

While I don't think this answers the speciffic question. It may help some others reading this thread.

Shotgun Sight Bead Thread List
Disclaimer: It is possible that any bead may have been retapped or the manufacturer may change their thread dimensions.

6-48 TPI
Remington/Ithaca/SKB

5-40 TPI
Mossberg

3-56 TPI
Browning Target Citori, Beretta, Kreigoff, Ruger, Weatherby, Winchester, Marlin, Stevens 311, H&R

M3.0-.5
Browning Gold, Citori Field, Franchi, H&K, Fabarm

M3-.6
Browning Citori Hunter

5-44 TPI
Browning BPS

M2.5-.45
S&W

3-48 TPI
New England Firearms

M2-6 will interchange with a 3-56 TPI

Happy Holidays,

Rob

nomaspescado · December 30, 2004, 05:41 PM

I'm going through the same hell right now with my Benelli Nova...I just want a brass bead sight!
Bad news is that I have been told two different sizes by Benelli..either it's a 2.5 or a 2.6mmx45. I finally called Beretta and a really nice girl there offered to send me one of their 2.5mm beads to try it out.
Am I the only Benelli shooter who wants a traditional brass bead over the plastic one?? Geeeez.
Sorry about the rant.

December 26, 2004, 05:29 PM	#1
atlantadad Member Join Date: March 21, 2001 Location: Atlanta, GA Posts: 36	Front bead sight threads Anyone know what the thread/pitch is for a EAA 20 Gauge and Lamber 12 Gauge O/U front sights are? Need to replace our fiber sights with traditional ones. Thanks.

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December 26, 2004, 07:37 PM	#2
Danindetroit Senior Member Join Date: October 1, 2004 Location: Detroit Posts: 757	home depots, usually have a block with threaded holes to test with. You can also go to a good hardware store, and test with nuts. I think those being European, they are going to be close to 3mm x .5. or .6. If they are metric, you can re-tap with a bottom tap to #4-48", or have a gunsmith do it. You might have to use a drill to drill out enough material, or the tap might break.

December 26, 2004, 08:02 PM	#3
HunterTRW Senior Member Join Date: December 3, 2004 Location: The Lower Forty of Hill Country Posts: 177	Try posting your questions in The Firing Line's "The Smithy" Forum. One of the gunsmiths there should be able to answer them.

December 29, 2004, 09:05 PM	#4
Rob62 Senior Member Join Date: June 28, 1999 Location: Georgia, USA Posts: 560	While I don't think this answers the speciffic question. It may help some others reading this thread. Shotgun Sight Bead Thread List Disclaimer: It is possible that any bead may have been retapped or the manufacturer may change their thread dimensions. 6-48 TPI Remington/Ithaca/SKB 5-40 TPI Mossberg 3-56 TPI Browning Target Citori, Beretta, Kreigoff, Ruger, Weatherby, Winchester, Marlin, Stevens 311, H&R M3.0-.5 Browning Gold, Citori Field, Franchi, H&K, Fabarm M3-.6 Browning Citori Hunter 5-44 TPI Browning BPS M2.5-.45 S&W 3-48 TPI New England Firearms M2-6 will interchange with a 3-56 TPI Happy Holidays, Rob __________________ NRA & NAHC Life Member

December 30, 2004, 05:41 PM	#5
nomaspescado Junior Member Join Date: November 8, 2004 Posts: 13	I'm going through the same hell right now with my Benelli Nova...I just want a brass bead sight! Bad news is that I have been told two different sizes by Benelli..either it's a 2.5 or a 2.6mmx45. I finally called Beretta and a really nice girl there offered to send me one of their 2.5mm beads to try it out. Am I the only Benelli shooter who wants a traditional brass bead over the plastic one?? Geeeez. Sorry about the rant.