TeedOff Posted May 16, 2017 Share Posted May 16, 2017 You guys have been very helpful on my open journey...so here's another what is probably a stupid question. I'm trying to mount a thumb rest on my new ck Arms open gun, but the screws supplied are too short. Of course the local hardware store doesn't have anything this small. So what is the screw size? Not worried about the length...will cut to fit. What is the typical diameter and thread pitch? Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
teros135 Posted May 16, 2017 Share Posted May 16, 2017 Mine are 5-40. I believe that's pretty much standard. Link to comment Share on other sites More sharing options...
TeedOff Posted May 16, 2017 Author Share Posted May 16, 2017 Thx teros! I think I've found what I need on amazon. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
teros135 Posted May 16, 2017 Share Posted May 16, 2017 Working on the 2011s can be as addicting as shooting them. Have fun! Link to comment Share on other sites More sharing options...
Sandbagger123 Posted May 16, 2017 Share Posted May 16, 2017 5-40 by 1/2" is long enough. Cut to correct size. you can get them at some home depots and specialty fastener places . or ebay and amazon Link to comment Share on other sites More sharing options...
TeedOff Posted May 16, 2017 Author Share Posted May 16, 2017 Working on the 2011s can be as addicting as shooting them. Have fun!I still have a lot to learn. Appreciate all the guidance I've gotten here. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Jimboslice Posted May 16, 2017 Share Posted May 16, 2017 I bought 5-40 x 1/2" ones and they were too short when I mounted my thumbrest. (cheely offset mount & RHT loud pedal). I order a 50 pack of 7/8" and just cut them to length. that way I know I will always have long enough screws to put whatever combination of mount and thumbrest on my guns. Link to comment Share on other sites More sharing options...
scooterj Posted May 16, 2017 Share Posted May 16, 2017 Avoid stainless. They are soft and will twist off. Link to comment Share on other sites More sharing options...
vtecpaoche Posted May 17, 2017 Share Posted May 17, 2017 (edited) Funny, I just got a DAA thumbrest. The screws supplied were too big to fit into the stock CK hole. I was just going to ask and my question was already answered. I'm going to order some longer ones and will cut them down to size as well. Thanks for answering the question before I even ask! Edited May 17, 2017 by vtecpaoche Link to comment Share on other sites More sharing options...
BeerBaron Posted May 17, 2017 Share Posted May 17, 2017 9 hours ago, scooterj said: Avoid stainless. They are soft and will twist off. Amen to that. Hardened mild steel in the black iron oxide style finish is what you need. The junk stainless ones will strip heads easily.... the daa rest may have come with metric screws which are what is used on tanfoglios and aimpoint setups. Link to comment Share on other sites More sharing options...
Foxbat Posted May 18, 2017 Share Posted May 18, 2017 5-40 is the most common thread, but there is also 6-40, that is much stronger. If you strip 5-40 you can tap it 6-40 without any problems. Link to comment Share on other sites More sharing options...
theWacoKid Posted May 18, 2017 Share Posted May 18, 2017 (edited) 5-40 on CK's and 6-40's often on other guns. For the 5-40's I upgrade everything to torx plus to get away from stripping hex keys and sockets. I've yet to find a good source for torx plus 6-40 flat heads. If anyone knows somewhere please pass it on. Edited May 18, 2017 by theWacoKid Link to comment Share on other sites More sharing options...
TeedOff Posted May 18, 2017 Author Share Posted May 18, 2017 5-40 on CK's and 6-40's often on other guns. For the 5-40's I upgrade everything to torx plus to get away from stripping hex keys and sockets. I've yet to find a good source for torx plus 6-40 flat heads. If anyone knows somewhere please pass it on. Do you have a link or source for Torx screws in 5-40? All I'm finding are hex and I've already experienced stripping the head. Grrr!Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Ssanders224 Posted May 18, 2017 Share Posted May 18, 2017 (edited) https://www.mcmaster.com/#94414a124/=17omzwe Edited May 18, 2017 by Ssanders224 Link to comment Share on other sites More sharing options...
theWacoKid Posted May 18, 2017 Share Posted May 18, 2017 (edited) 4 hours ago, TeedOff said: Do you have a link or source for Torx screws in 5-40? All I'm finding are hex and I've already experienced stripping the head. Grrr! McMaster is the place to get torx plus 5-40's and the torx plus wrenches. The 6-40's unfortunately aren't available. Edited May 19, 2017 by theWacoKid Link to comment Share on other sites More sharing options...
TeedOff Posted May 18, 2017 Author Share Posted May 18, 2017 Thanks for the reminder on McMaster...I had failed to check there. Link to comment Share on other sites More sharing options...
Ssanders224 Posted May 18, 2017 Share Posted May 18, 2017 21 minutes ago, TeedOff said: Thanks for the reminder on McMaster...I had failed to check there. See my link above. Link to comment Share on other sites More sharing options...
TeedOff Posted May 18, 2017 Author Share Posted May 18, 2017 Just now, Ssanders224 said: See my link above. Got it! Thanks. Link to comment Share on other sites More sharing options...
Sandbagger123 Posted May 18, 2017 Share Posted May 18, 2017 2 hours ago, theWacoKid said: McMaster is the place to get torx plus 5-40's and the torx plus wrenchs. The 6-40's unfortunately aren't available. seeing that 6-32 is a lot more common, would there be any issue in using it instead of 6-40? Link to comment Share on other sites More sharing options...
theWacoKid Posted May 19, 2017 Share Posted May 19, 2017 2 hours ago, Sandbagger123 said: seeing that 6-32 is a lot more common, would there be any issue in using it instead of 6-40? You just get a little more thread engagement in the thin amount of frame available. But the guns tend to already be threaded 5-40 or 6-40 to start with so you're stuck in that box. Link to comment Share on other sites More sharing options...
b18prl Posted May 19, 2017 Share Posted May 19, 2017 6-48Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
BeerBaron Posted May 19, 2017 Share Posted May 19, 2017 6 hours ago, Sandbagger123 said: seeing that 6-32 is a lot more common, would there be any issue in using it instead of 6-40? 6-32 will give you less threads to engage. The second number is TPI - threads per inch. My infinity had 5-40s too. When one snapped I drilled the holes out and re-tapped them to metric 4mm fine thread. More threads and bigger/stronger screws with larger flats on the heads. So much nicer. I have nfi why everyone uses such pissy little screws. Link to comment Share on other sites More sharing options...
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