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Ar15 gas key screw !!

Discussion in 'Rifle Discussion' started by usmc, Dec 30, 2015.

  1. usmc

    usmc oregon Active Member

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    So I bought a brand new inch lbs torque wrench and attempted to torque the gas key screws. I set my inch pound wrench to 50 inch lbs, and SNAP. Removed screw placed another one, set to 30 ilb, then SNAP. So I bought "supposedly better screws" . Set to 20 ilbs and ......SNAP. Am I a complete idiot or do I need better screws?
     
  2. deadeye

    deadeye Albany,OR. Moderator Staff Member

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    Maybe a better torque wrench?
     
  3. jbett98

    jbett98 NW Oregon Bronze Supporter Bronze Supporter

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    Does it say "Made in China" on the side of the torque wrench?
     
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  4. x2ndxall

    x2ndxall WA Bronze Supporter Bronze Supporter 2016 Volunteer

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    And you stopped when it clicked?
     
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  5. Velzey

    Velzey Estacada, Oregon Gunsmith Gunsmith Bronze Vendor Bronze Supporter

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    Should be using grade 8 socket head cap screws. I think 55 inch pounds is the mil standard.

    Its only about 4.5 foot pounds, and make sure you stake them in place!
     
  6. jbett98

    jbett98 NW Oregon Bronze Supporter Bronze Supporter

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    Remember to back off the torque wrench to zero when finished.
    Otherwise, you will change the torque setting calibrations.
     
  7. Stomper

    Stomper Oceania Rising White Is The New Brown Silver Supporter

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    As mentioned; don't go cheap on torque wrenches, or proper shear strength bolts.
     
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  8. usmc

    usmc oregon Active Member

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    Thanks , guys, so turns out I'm a complete moron. The click was so faint I couldn't feel it. Now I got a feel for it and they worked out great. pshh....:oops:
     
  9. jbett98

    jbett98 NW Oregon Bronze Supporter Bronze Supporter

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    Hey, at least you knew the difference between foot lbs and inch lbs.
    I had to learn the hard way. I didn't even know they made inch lb torque wrenches and was even more clueless about the inch to lb torque conversion charts.
     
    Last edited: Dec 30, 2015
  10. Velzey

    Velzey Estacada, Oregon Gunsmith Gunsmith Bronze Vendor Bronze Supporter

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    So I have been using 4.5 lbs all these years, now they are all going to come loose.:(. Oh wait no, I made sure they won't because I staked them properly! :) And staking is critical when your running full auto!
     
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  11. Stomper

    Stomper Oceania Rising White Is The New Brown Silver Supporter

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    Inch-pounds divided by 12 equals foot-pounds.... yeah? o_O;)
     
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  12. rick benjamin

    rick benjamin USA, Or, Damascus Secure the drama Silver Supporter 2016 Volunteer

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