Results 1 to 5 of 5

Thread: Fan screw thread pitch?

  1. #1
    Join Date
    Oct 2006
    Location
    jonnyGURU forums, of course!
    Posts
    17,305
    Thanks Thanks Given 
    579
    Thanks Thanks Received 
    652
    Thanked in
    476 Posts

    Default Fan screw thread pitch?

    You would think this would be an easily answered question, but I can't find the answer anywhere!

    Apparently I have two different fan screws with two different thread pitches.

    I know one is 5mm diameter, with a T16 pitch. The other is 4.9mm with a T14 pitch.

    What does T16 and T14 actually mean? And which one is "standard"?

  2. #2
    Join Date
    Jul 2011
    Location
    Germany, Berlin
    Posts
    1,706
    Thanks Thanks Given 
    1,090
    Thanks Thanks Received 
    58
    Thanked in
    41 Posts

    Default

    I have absolutely no idea.

  3. #3
    Join Date
    Jan 2020
    Location
    California
    Posts
    126
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default

    Quote Originally Posted by Jon Gerow View Post
    You would think this would be an easily answered question, but I can't find the answer anywhere!

    Apparently I have two different fan screws with two different thread pitches.

    I know one is 5mm diameter, with a T16 pitch. The other is 4.9mm with a T14 pitch.

    What does T16 and T14 actually mean? And which one is "standard"?
    IS it a Torx head screw?

    "Torx head sizes are described using the capital letter "T" followed by a number ranging from T1 to T100."
    https://en.wikipedia.org/wiki/Torx

    But, you are saying that the screw actually lists itself as T14 pitch and it is metric? I've never seen that. AS you know:

    M8-1.0 x 20

    Here's what the description means…

    M = Metric thread designation

    8 = Nominal diameter, in millimeters

    1.0 = Pitch (distance from thread to thread), in millimeters

    20 = Length, in millimeters (see below)

    This example illustrates how a coarse threaded screw may appear…

    M12 x 25 = 12 mm diameter, coarse thread is assumed (1.75 mm), 25 mm long

    M12 is a matching coarse threaded nut
    https://www.fastenermart.com/underst...fasteners.html

  4. #4
    Join Date
    Oct 2006
    Location
    jonnyGURU forums, of course!
    Posts
    17,305
    Thanks Thanks Given 
    579
    Thanks Thanks Received 
    652
    Thanked in
    476 Posts

    Default

    Quote Originally Posted by DWD1961 View Post
    IS it a Torx head screw?

    "Torx head sizes are described using the capital letter "T" followed by a number ranging from T1 to T100."
    https://en.wikipedia.org/wiki/Torx

    But, you are saying that the screw actually lists itself as T14 pitch and it is metric? I've never seen that. AS you know:

    M8-1.0 x 20

    Here's what the description means…

    M = Metric thread designation

    8 = Nominal diameter, in millimeters

    1.0 = Pitch (distance from thread to thread), in millimeters

    20 = Length, in millimeters (see below)

    This example illustrates how a coarse threaded screw may appear…

    M12 x 25 = 12 mm diameter, coarse thread is assumed (1.75 mm), 25 mm long

    M12 is a matching coarse threaded nut
    https://www.fastenermart.com/underst...fasteners.html
    No. They're not Torx.

    And yes, metric screws are usually measured in threads per mm.

    These are actually measured in TPI despite having metric diameters and lengths.

    https://imgur.com/a/sxodioY

  5. #5
    Join Date
    Jan 2020
    Location
    California
    Posts
    126
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default

    Quote Originally Posted by Jon Gerow View Post
    No. They're not Torx.

    And yes, metric screws are usually measured in threads per mm.

    These are actually measured in TPI despite having metric diameters and lengths.

    https://imgur.com/a/sxodioY
    What next? Amazing.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •