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  1. 31st March 2012, 03:33 PM #1
    richardjcami
    richardjcami is offline New Member
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    Default US screw/bolt sizes - Australian equivalents

    Hi,

    I have a DIY 'recipe' requiring the following items, but I am unsure of their AU/metric equivalents and can't seem to find any decent information online (I suspect I'm getting the terminology wrong). Any help would be super appreciated:

    #10 Washers
    #10-24 Machine Screws, Hex Nuts, Wing Nuts
    1/4"-20 Screw

    Cheers,
    Richard
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  3. 31st March 2012, 04:24 PM #2
    NCArcher's Avatar
    NCArcher
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    The # is the gauge size and the second number is the threads per inch of the screw.
    #10 is around 4.8 mm or 3/16" in diameter and 1/4" is 6.4mm in diameter.
    You could use 5 and 6mm as an alternative to the American sizes although if you needed a particuler thread to match an existing nut you should be able to get both of those sizes from a specialty bolt supplier.
    Those were the droids I was looking for.
    https://autoblastgates.com.au
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  4. 31st March 2012, 04:29 PM #3
    richardjcami
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    100 thankyous!
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  5. 31st March 2012, 04:57 PM #4
    NCArcher's Avatar
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    I believe that's 48.7 metric thankyous
    Those were the droids I was looking for.
    https://autoblastgates.com.au
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  6. 1st April 2012, 12:56 AM #5
    bsrlee
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    Instead of going to one of the 'big box' stores, just go to an industrial fastener supplier - Coventry Fasteners in Sydney, other names in Melbourne.

    As there are millions of dollars worth of pre-metric and US made machines out there, they stock a full range of 'Imperial' as well as US thread fasteners. Some even sell them singly as well as by the box.
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  7. 1st April 2012, 08:38 AM #6
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    This site has a reasonable chart. Drill Size Chart Has metric/#/fractional inch
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