Thank you so much for such detail information :heart_eyes:
The threads on SP10 are what many call square cut.
To be precise, I don’t think they are actually square cut. It seems to be trapezoidal thread. Regardless, it is not triangular cut threads you see in many cheaply machined lights.
Edit: I cleaned the lube off and looked at it more closely. I think the threads of SP10 Pro are indeed square cut threads.
I stand corrected. I thought they were triangle-cut threads, but I didn’t look close enough. They’re actually very small square-cut threads.
In any event, both the SP10v3 and SP10 Pro have the same threads.
Firelight2 Limsup;
Thank you guys, that picture help to see very clearly.
I would buy this light with Nichia 519A installed and without any type of blink on the ramp. Hope this will be correct soon
These are not square cut threads - photos above are not sufficient to really tell, though. They are trapezoidal threads with the crests maybe a little flatter/wider than some. Not all that different than what’s on the Convoy T2/T3 and many other lights.
It can be tricky to see these clearly sometimes especially if they are shiny from grease or have direct light on them. Mildly backlit against a light background and with a low power magnifier you can clearly see that they are not true square cut at all. But that’s fine…they’re well machined and finished, feel great and work very smoothly, cap goes back on effortlessly, which is what’s important.
At least the thread’s fell like there gonna last on the sp10pro. A sp21pro that I bought, only catches on the last turn.
With the stock 33.9mm long battery, my SC21 Pro has more than just the last turn.
Are you maybe using a longer battery?
Forgot to post back about the H10 cells. Not getting much more from them but the one of the four gives a little more oomph. With the clamp I got a max of 2.5A and that one cell gave 2.6A, if the meter can be trusted there.
Also received the green magnetic tailcap. Nicely done, magnet feels on the weaker side, probably just N35. It has a larger/wider spring in there compared to the stock eared tail cap. I tried to remove the magnet with a long acetone soak and couldn’t get it to budge so I’ll likely break it out…have some N52 1/2”x3/32” coming in the mail which should add a couple pounds of pull or more.
Well, this is the best picture I can get with my old busted not so tough camera, but I still can’t really see these as trapezoidal threads……
The threads are called “Acme” the design is stronger than std v-cut threads. Kudos to Sofirn for using an upgraded thread. Now, hopefully they’ll correct that dam blink at the top!
I feel the same way.
Blinking during Ramping is an Anduril “feature”, not specific to the SP10 Pro.
My FWAA has the same feature, and it really Bugs Me. I prefer my TS10 and SC21 Pro, because they do NOT blink during ramping.
imo ALL blinkies should be Optional.
Right now there is No Option for a user to Select to turn off Blinking during Ramping.
Hmm. Shirnask’s pic on the red light has threads that look slightly different from my green SP10 Pro…closer to Acme (which is not a true square cut…better in some ways, at least from a machining standpoint) but they do not look quite the same as the US made Acme threads I have on hand to compare with, for whatever that’s worth. Very similar to what’s on the Convoy M1, WildTrail WT3M, Wurkkos FC11, Sofirn IF22/22A, and most Rofis lights. Wonder if they changed things up, perhaps different machines or locations. At any rate…well done threads, one of the few that are a pleasure to use with good feel and fit and not too much spring pressure to overcome when you start it on.
I have finally succeeded in learning how to reflash my SP10 Pro
thank you for all your help
I flashed that file, and like the 04-14 version from Sofirn, it has a Blink at top of ramp
is there a Hex file with NO Blink at top of ramp?
Great! No, but I’ll cook one up for you here shortly and will post it up.
EDIT: here ya go, try this one
thank you very much for the Hex file, it works! no more Ramping Blink! 
These look good. I’m still interested whenever you have time to complete the batch. Thanks
Picked up a Red SP10 Pro now that they are on Amazon (US). I think this is the most threadlocker i’ve seen on a single light ever. Probably 90% coverage of every thread all the way around. I thought I was going to change the anodizing color with the amount of hot air I was applying.
congrats on getting it open… what LED are you going with?
This SP10 Pro was super easy, no threadlocker at all:
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Worst I’ve seen was on a Fenix light.
They used so much threadlocker that it filled 100% of the threads with excess squeezing out on both sides. It was red threadlocker too. Almost broke my pliers unscrewing the pill and this on a one AAA sized light.