PopRocket123 Posted July 12, 2020 Share Posted July 12, 2020 I've got a SCAR H project that needs some 3d printed parts but I have no way of measuring them. The first is a replacement gas plug which was missing when I got it and the second is the threads from an M4 lower receiver for a buffer tube adapter if you know the dimensions for Fusion 360 or where to find them that would be a big help thanks. Link to comment Share on other sites More sharing options...
Supporters Adolf Hamster Posted July 12, 2020 Supporters Share Posted July 12, 2020 that gas plug looks very similar in profile to the one on the f2000, but then i'm not sure if it's just the same proportions scaled up. Link to comment Share on other sites More sharing options...
qyuubi786 Posted July 12, 2020 Share Posted July 12, 2020 I'd get myself some callipers if I was you. Comes in very handy for all kinds of things. Link to comment Share on other sites More sharing options...
Ropeyshep Posted July 12, 2020 Share Posted July 12, 2020 Just now, qyuubi786 said: I'd get myself some callipers if I was you. Comes in very handy for all kinds of things. And a thread pitch gauge. They are cheap and amazingly handy. Link to comment Share on other sites More sharing options...
PopRocket123 Posted July 12, 2020 Author Share Posted July 12, 2020 16 minutes ago, qyuubi786 said: I'd get myself some callipers if I was you. Comes in very handy for all kinds of things. Already got a very nice set. I just can't get in to measure the threads an I don't have the part to measure for the gas plug Link to comment Share on other sites More sharing options...
Supporters Adolf Hamster Posted July 12, 2020 Supporters Share Posted July 12, 2020 1 minute ago, PopRocket123 said: Already got a very nice set. I just can't get in to measure the threads an I don't have the part to measure for the gas plug i'll measure up the one on the f2000 for you tomorrow, hopefully you can measure it's socket see if it's the right size. Link to comment Share on other sites More sharing options...
PopRocket123 Posted July 12, 2020 Author Share Posted July 12, 2020 9 minutes ago, Adolf Hamster said: i'll measure up the one on the f2000 for you tomorrow, hopefully you can measure it's socket see if it's the right size. Great thanks. If I need to I can just scale it up 30 minutes ago, Ropeyshep said: And a thread pitch gauge. They are cheap and amazingly handy. Will that work with buffer tube threads? They're very deep and different to standard sizes of threads Link to comment Share on other sites More sharing options...
Ropeyshep Posted July 12, 2020 Share Posted July 12, 2020 1 hour ago, PopRocket123 said: Great thanks. If I need to I can just scale it up Will that work with buffer tube threads? They're very deep and different to standard sizes of threads How are they different? Pitch gauges give you number of teeth per mm and various Whitworth, AF and suchlike old timey pitches. Threads are threads, nothing uses a completely unique version of them. These threads (🧐 sorry ) seem to suggest a 1 3/16” 16tpi threadform for that stock tube thread on an AR15 which would seem to be the same fitting as a SCAR. http://chaski.org/homemachinist/viewtopic.php?t=76344 https://www.ar15.com/forums/ar-15/What_is_the_thread_pitch_on_a_buffer_tube_/118-263144/ Pick up a dirt cheap TPI and metric versions for your future use: https://www.amazon.co.uk/sourcing-map-Thread-Cutting-Measuring/dp/B07TXZTC6B/ https://www.amazon.co.uk/gp/aw/d/B07PDG5ZML Link to comment Share on other sites More sharing options...
PopRocket123 Posted July 13, 2020 Author Share Posted July 13, 2020 7 hours ago, Ropeyshep said: How are they different? Pitch gauges give you number of teeth per mm and various Whitworth, AF and suchlike old timey pitches. Threads are threads, nothing uses a completely unique version of them. These threads (🧐 sorry ) seem to suggest a 1 3/16” 16tpi threadform for that stock tube thread on an AR15 which would seem to be the same fitting as a SCAR. http://chaski.org/homemachinist/viewtopic.php?t=76344 https://www.ar15.com/forums/ar-15/What_is_the_thread_pitch_on_a_buffer_tube_/118-263144/ Pick up a dirt cheap TPI and metric versions for your future use: https://www.amazon.co.uk/sourcing-map-Thread-Cutting-Measuring/dp/B07TXZTC6B/ https://www.amazon.co.uk/gp/aw/d/B07PDG5ZML Ok thanks. They just looked deeper than normal Link to comment Share on other sites More sharing options...
Supporters Adolf Hamster Posted July 13, 2020 Supporters Share Posted July 13, 2020 ok so i had a look at the f2000 gas plug. the dimensions to check for the hole are 10.5mm diameter by 12mm deep: solid edge has a nasty habit of exporting .stl files with the units in inches, so some re-scaling may be necessary.F2000 gas plug.stl F2000_gas_plug.stl Link to comment Share on other sites More sharing options...
PopRocket123 Posted July 13, 2020 Author Share Posted July 13, 2020 That's perfect thanks. I'll let you know how I get on with that this evening. This'll really complete the front end Link to comment Share on other sites More sharing options...
PopRocket123 Posted July 13, 2020 Author Share Posted July 13, 2020 8 hours ago, Adolf Hamster said: ok so i had a look at the f2000 gas plug. the dimensions to check for the hole are 10.5mm diameter by 12mm deep: solid edge has a nasty habit of exporting .stl files with the units in inches, so some re-scaling may be necessary.F2000 gas plug.stl F2000_gas_plug.stl 3.97 MB · 0 downloads Just checked this out and it's a perfect size. I guess FN reuse parts between guns Link to comment Share on other sites More sharing options...
Supporters Adolf Hamster Posted July 13, 2020 Supporters Share Posted July 13, 2020 27 minutes ago, PopRocket123 said: Just checked this out and it's a perfect size. I guess FN reuse parts between guns guess it would make sense given it's just a gas plug. that stl file work ok? Link to comment Share on other sites More sharing options...
PopRocket123 Posted July 13, 2020 Author Share Posted July 13, 2020 36 minutes ago, Adolf Hamster said: guess it would make sense given it's just a gas plug. that stl file work ok? Yep loaded no problem. I've send it off to get printed out with the rail extension Link to comment Share on other sites More sharing options...
Wo1f Posted July 13, 2020 Share Posted July 13, 2020 I was just about to break out the scar’s gas plug to measure! Saved me a job 😂 Link to comment Share on other sites More sharing options...
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