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Thread: looking for an ISO G 1/8 tap

  1. #1
    Join Date
    Jul 2007
    Location
    Central Connecticut
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    207

    Default looking for an ISO G 1/8 tap

    Hello,
    I hope everyone is doing well. Things were going well for
    me with a high-pressure bleeder plug I'm putting into a SS housing for a potted tach-connector
    assembly used on a hydraulic drive used at a sea depth of up to 1500 meters.
    I need an ISO G1/8 (28 threads per inch) tap. The one Parker offers costs $131.00 each, and has a lead time of 4 weeks, so they are obviously not the place to deal with.
    I was hoping to get 3 of them, but the price is too high. Does anyone know of a good source
    for these? I could really use any help I can get on this.
    Thanks,
    Ray

  2. #2
    Join Date
    Mar 2005
    Location
    Toronto
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    6,572

    Default

    aren't these the same as British Standard Pipe Threads? msc# MSC #: 88244959

    http://www1.mscdirect.com/cgi/NNSRIT...-SearchResults
    .

  3. #3
    Join Date
    Jul 2007
    Location
    Central Connecticut
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    Default

    Yes, I believe it is a British Standard Pipe Thread. I was looking for the ISO and/or DIN designation,so I didn't catch it on my initial MSC search, but the MSC #: 88244959 looks like the right one. Thanks so much for your help. My day is looking brighter now.

  4. #4
    Join Date
    Sep 2008
    Location
    UK
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    Default

    Need to be careful - 'G' threads are parallel, i.e. BSP, not BSPT (taper) as per link.

    Cheers

    .

  5. #5
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    Default

    Quote Originally Posted by Barrington View Post
    Need to be careful - 'G' threads are parallel, i.e. BSP, not BSPT (taper) as per link.

    Cheers

    .
    good catch....would this be the one? Almost wrecked your day hoof

    http://www1.mscdirect.com/cgi/NNSRIT...-SearchResults
    .

  6. #6
    Join Date
    Sep 2010
    Posts
    203

    Default

    ISO 228 - replaces DIN 259 (Withworth pipe thread, parallel internal and parallel external.
    These threads do not seal in the threaded portion but seal by tightening two shoulders with a seal ring between them if needed. Used on fittings, valves etc. if a high degree of sealing is required.
    G1/8 - 28
    Outside dia....9.728
    Pitch dia........9.147
    Core dia...8.566

  7. #7
    Join Date
    May 2002
    Location
    NL
    Posts
    1,389

    Default

    Hi
    G1/8 BSP 1/8-28
    KBC Tools carries these as well as etap.com
    If you are not in too big a hurry you can usually find them on e-bay
    links:
    http://www.e-taps.com
    http://www.kbctools.com
    please visit my webpage:
    http://motorworks88.webs.com/

  8. #8
    Join Date
    Jun 2006
    Location
    Austin, Texas
    Posts
    15,651

    Default

    Quote Originally Posted by Juergenwt View Post
    ISO 228 - replaces DIN 259 (Withworth pipe thread, parallel internal and parallel external.
    Whoever came up with ISO-G should be strung up by the balls -- I posted about those mongrels when I rebuilt my Eisle cold saw: Whitworth threads with Metric orifices

    European G 1/8 pipe threads?
    http://bbs.homeshopmachinist.net/thr...-threads/page2

    The ISO-R have the BSPT (tapered threads).
    Last edited by lazlo; 03-28-2013 at 06:18 PM.
    "Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did."

  9. #9
    Join Date
    Dec 2006
    Location
    Hazel Park, Michigan
    Posts
    337

    Default

    I hate those straight 4 flute taps, they cut like ...crap...this is a little pricy but it has lasted me a long while...little effort to cut the thread, nice clean results...

    http://www.amazon.com/dp/B003JY6N64/ref=biss_dp_t_asn

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