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Posted: 5/29/2010 4:45:10 PM EDT
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I have a stripped Noveske lower that I am getting ready to paint I am wanting to use a long bolt in the grip screw hole to hold it while airburshing.
I went and got a nice 1/4-28x4 inch bolt but it will only catch about one thread. I thought for sure it was the appropriate size even checked one of the guages and a 1/4-28 nut on the grip screw still no joy. Am I missing something? I haven't a clue what the problem could be. |
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You might want to double check the threads on the screw.
If you got the screw at your local hardware store, the odds of someone mixing stuff up in the bins is pretty good. Most HW stores don't have a very good selection of 1/4"-28 stuff so I'd be surprised if you found one as long as you state. (If that was your source.) Also check where the threads start at the beginning of the screw. Depending on the quality of manufacture / QA that's another spot that can get buggered up. Another possiblity is there is some locktite in the threads of the hole causing the binding. |
| Here's a cheap fix. Get a Ar grip screw. Take a Dremel with a cut off wheel and cut a "V" length wise about a 1/2 to a 1" from the bottom of the bolt. Take a small jewlers file and clean any burrs off the thread. Not what you have is a " Poor mans" thread chaser that will clean that up easy. use a drop of oil on the bolt when you use it. Save this bolt for future projects. |
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I picked up a 4" grade 8 standard bolt it is definitely a 1/4-28. Only thing I can figure it could be a tolerance stacking issue between the thread profile and the anondizing of the lower. I picked up a different bolt a grade 5 1/4-28x3 from a different place I can catch about 3-4 threads before it gets to tight to turn by hand.
Anyway the other bolt should hold well enough to keep my fingers off the receiver while painting. |
Just like Russ4777 said, buy a 1/4" fine (1/4x28) tap and run it through by hand to clean up the threads. B.T.W. the number 28 is the amount of threads per inch. Good luck with your paint job. Taps are available at most home centers, compare the coarse and fine 1/4" taps to make sure you have the right bolt.
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Quoted:
Just like Russ4777 said, buy a 1/4" fine (1/4x28) tap and run it through by hand to clean up the threads. B.T.W. the number 28 is the amount of threads per inch. Good luck with your paint job. Taps are available at most home centers, compare the coarse and fine 1/4" taps to make sure you have the right bolt.Some auto parts stores also have a decent selection of taps. I got mine at NAPA when I cross-threaded a grip screw.  It was less than $5.
When you're done using it, oil it well (WD-40 is good for this) and keep it in a safe, dry place. |
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