Common Dimensions reference thread

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SureFire G2 Nitrolon
Threads: 16 tpi; 6 threads

Bezel
Max(threads incl.)=1.125
Min(inner bore of tube)=1

Tailcap
Max(threads incl.)=0.875
Min(inner bore of tube)=1

Bezel Outer=1.25
Tailcap Outer=1
Body Outer=1

please recheck these and pm/post if they are right or wrong, thanks!
 
Does anyone know the o-ring size for Surefire flashlights? (Specifically, the Kroma-MS, M2, and M3...) Yes, I know Surefire will send me replacement buna-n ones, but I would like to buy some silicone ones and would like to make sure I get the correct size instead of just eyeballing it.

Thought it would be best to ask in this thread instead of creating a new one...thanks for any info...

JM-99
 
Jumpmaster said:
Does anyone know the o-ring size for Surefire flashlights? (Specifically, the Kroma-MS, M2, and M3...) Yes, I know Surefire will send me replacement buna-n ones, but I would like to buy some silicone ones and would like to make sure I get the correct size instead of just eyeballing it.

Thought it would be best to ask in this thread instead of creating a new one...thanks for any info...

JM-99
Click to expand...

this is a list of all the o-ring sizes.

http://www.oringswest.com/

if you lay the o-ring on top of a scale ( ruler - tape measure ) you might be able to determine the size. cross section is the thickness of the o-ring.
 
Thanks, Will...I don't want to have to eyeball it. Hoping someone would have the actual size somewhere. I called SF, but they were unhelpful...I didn't know if maybe someone else had been able to extract that bit of information out of them before. :)

JM-99

will said:
this is a list of all the o-ring sizes.

http://www.oringswest.com/

if you lay the o-ring on top of a scale ( ruler - tape measure ) you might be able to determine the size. cross section is the thickness of the o-ring.
Click to expand...
 
Bump for a handy thread. Especially interested in any SureFire-related dimensions not already listed. :whistle:
 
SF C/P/Z series is 20TPI, not 16TPI.

HarryN said:
Could someone please post the thread specs on the SF M and C series ? The C appears to be 20 TPI, but I was hoping someone could be more specific for me.
Click to expand...

flash_bang said:
SureFire G2 Nitrolon
Threads: 16 tpi; 6 threads

Bezel
Max(threads incl.)=1.125
Min(inner bore of tube)=1

Tailcap
Max(threads incl.)=0.875
Min(inner bore of tube)=1

Bezel Outer=1.25
Tailcap Outer=1
Body Outer=1

please recheck these and pm/post if they are right or wrong, thanks!
Click to expand...
 
I haven't seen it yet, but it looks like the 6P bezel threads are
1 1/8"-20 tpi.
 
Gene43 said:
I'm looking for the inner body tube diameter for older C and D Maglites without the c or d in the serial number.

Thanks, Gene malkoff
Click to expand...

Only a couple of years late, but I measured 1.454" ID for an old red 3D DMag without the D in the serial number. For an old black 4C Mag (no "C" in the serial number), I measured 1.102" ID. Both measurements made at the head of the tube body.

Edit: At the tail of the 4C Mag, I get 1.120" at the very bottom of the tube before the start of the tail threads and 1.050" at the threads. I can't get in deep enough to measure the tube diameter past the threads, but that diameter is clearly less than at the end of the tube. My IMR26500 cells go in very easily initially, but start to get tight as soon as they hit this section of the Mag tube.
 
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I measure the inner diameter of my E1E to be 0.674" at the head end. Can anyone add theirs to this thread? I'm trying to get an idea of the tolerance band for the inner diameter of E-series lights.
 
I would like to know bezelring thread size for the MiniMagAA.
 
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AndyF said:
Anyone know this?.
Click to expand...

Surefire E series are 13/16-20 for the head - uncertain if E and A are the same or not. You can purchase a thread measuring gage on Amazon or at most auto parts stores. Find the pitch that exactly fits the thread profile & you're 90% done. Measure the OD with a 0-1" mic (available from the same sources) & convert decimal to fraction.

I only measure threads when machining a mating part & those parts are normally large pitch (1"-12, 2"- 4.5, etc.). Small pitch threads are more challenging to measure & there's some potential for error.
 
E and original A2 are not the same. Some later A are the same. The original A2 is likely 7/8 inch diameter thread since I measure mine JUST under 7/8 inch across thread tips. I don't have a pitch gauge, but the threads are likely 20 tpi like the E series.
 
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