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Old December 31, 2018, 18:20   #1
tesoro
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Are all metric handguard screws the same size?

Hello. Happy/Merry to all.
I would like to know if all metric handguard screws have the same dimensions.
A Steyr barrel I have won't allow other metric handguard screws through gas block for proper securement. Non StG58 handguard screws won't come close to fitting through?
Even DSA's new SA58 plastic (reinforced) handguard screws have a diameter to large?
Thanks

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Old December 31, 2018, 18:39   #2
meltblown
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Some are a tad longer but the threads are the same.
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Old January 01, 2019, 00:45   #3
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It may need just a bit of enlargement. It's possible that the gas block is ever-so-slightly misaligned keeping the screw from going through proper. Make sure you have the right screw, too.


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Old January 01, 2019, 10:55   #4
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It is also possible that it is not the original gas block and the hole has been deformed from driving it off another barrel. Hammer a tapered punch into the hole to confirm it is concentric. The deform easily, but they also reshape easily.
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Old January 01, 2019, 11:48   #5
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When I was getting all the parts together for my first FAL, I needed a bit longer hand-guard screw. Locally, the only source was the John Deere tractor dealer. Might keep that possibility in mind.
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Old January 01, 2019, 11:54   #6
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It's a #10x32. The only difficult thing about a commercial substitute is that it is likely to be threaded entire length, and getting a slotted one is hard as most are phillips.
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Old January 01, 2019, 14:11   #7
tesoro
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Doubt anything is misaligned. The original metal StG58 handguards and screw fit together like butter.
The GunPlumber serviced and painted my rifal. The handguards look so nice w the Metacol III, I don't want the bipod to scratch 'em. So I bought two different metric handguard sets. One is a new DSA SA58 set, the other unknown milsurp. Neither screw will fit through gas hole to engage other handguard. They are to fat. Both sets of handguards fit, except the screw.
I was going to order another metric screw from GP, but want to make sure it'll fit. If not, I reckon I have no choice but to order StG58 handguards just to get the screw.
At the moment I have the original StG58 screw attached to the new DSA handguards. Screw theads perfect. I just need another StG58 handguard screw.
Thanks
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Old January 01, 2019, 14:51   #8
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All my metric HG screws including 2 from STGs are 0.194". The inch types are a little smaller in diameter, but the tapered head won't work.
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