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What is the TPI of a standard 14mm thread?


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3 replies to this topic

#1 The Grand Baboon

The Grand Baboon
  • Gender:Male
  • Location:Utah!
  • Interests:Hunting, backpacking, airsofting

Posted 12 January 2012 - 12:18 PM

Trying to model a custom built part for an airsoft rifle in Autocad Inventor, does anybody know the TPI of a standard 14mm thread found on airsoft rifles?


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#2 BigEd

BigEd
  • Gender:Male

Posted 15 January 2012 - 10:32 AM

Metric threading are read by pitch. There are three types of thread pitch for larger metric sizes.

Coarse 1.5
Fine 1.25
Extra fine 1.0

Example: A die would read 14mm x 1.25 (Diameter x Pitch)
You can run the die to whatever length of threading you need.

Majority of airsoft threading is either fine, or extra fine, for Sizes Above 8mm.
Sizes 7mm and smaller only have one choice of pitch for each diameter.

///ed///
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#3 lndncr2

lndncr2
  • Gender:Male
  • Location:Nor Cal

Posted 15 January 2012 - 11:06 AM

Most barrels are 14mm x 1.0mm left hand threads. Some are right hand, but very few. HTH

Edited by lndncr2, 15 January 2012 - 11:08 AM.

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#4 yee245

yee245
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Posted 15 January 2012 - 01:10 PM

QUOTE (BigEd @ Jan 15 2012, 10:32 AM) <{POST_SNAPBACK}>
Example: A die would read 14mm x 1.25 (Diameter x Pitch)

It may also be written M14x1.25 for that same die.
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