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  1. #1
    Dragging not Bragging vince-305's Avatar
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    The Thread Thread

    I don't know about you lot but I sometimes have a difficulty in trying to find out which thread is which

    For an example I was today trying to work out if the thread on my track rod end was 5/8 unf, M16 metric it transpires that its M16 so i thought id replace it with with a rose joint but they come in 2 pitches, 1.5 and 2.0

    How do you tell, Well Ive found this site and they have down loadable thread charts that I feel would be a help to one and all (except the know it all's )

    All you need to do is lay the bolt over and hey presto you have the size and the pitch

    And if you don't want to print it off just change the size to 68% and work straight from the comfort of indoors

    (maybe Si could make them down loadable from here too)

    http://www.boltdepot.com/fastener-in...s/Default.aspx

    Dont forget to adjust the size prior to measuring
    Last edited by vince-305; 05-08-2009 at 11:21.
    Bit'z 'N' Piece's
    Ford consul mk2 chevy powered highrider

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  3. #2
    Official RnS Addict 35kid's Avatar
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    why not buy a thread gauge instead of trying to work with bits of paper?

    they are only a few pounds and no more guessing

    http://cgi.ebay.co.uk/DRAPER-UNC-UNF...d=p3286.c0.m14

    http://cgi.ebay.co.uk/DRAPER-METRIC-...d=p3286.c0.m14

    loads of them on ebay but if you have an engineering supplies shop near you they will have them too.
    Last edited by 35kid; 05-08-2009 at 12:18.

  4. #3
    Cadillac fanatic MR1958CADILLAC's Avatar
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    [QUOTE=35kid;32351]why not buy a thread gauge?

    they are only a few pounds and no more guessing

    QUOTE]

    I have these Vin, should have said last night

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  6. #4
    Official RnS Addict fozwanger's Avatar
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    Telling the difference is easy,

    If you hold the bolt up you can see by the flank angle and form whethere it's metric or whit, UNC or UNF.

    If the part has to be strong and has little in the way of engagement then it'll be a fine pitch.
    A thread requires 1 x d (where d= thread diameter) to be able to take full load (hence the reason nuts are the thickness they are).

    You generally find that most things Yank upto about a couple of years ago are unc and unf (unf approx 20 tpi, unc a lot less) and most things European from about 1980 onwards are metric.

    Buy a thread gauge and chart is far easier if you do not deal with threads everyday.

    As a good engineer says, someones done all the hard work for you, you just have to know where to go to find out about it......

    :-)

  7. #5
    Dragging not Bragging vince-305's Avatar
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    Red face You can only help some of the people some of the time

    Oh well, as i said No good to the know it all's and have it all's
    Last edited by vince-305; 05-08-2009 at 15:05.
    Bit'z 'N' Piece's
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