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Thread: I've been doing it wrong all my life. JIS

  1. #1
    Join Date
    Dec 2003
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    Giddings, Texas
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    Default I've been doing it wrong all my life. JIS

    Raise your hand if you have ever worked on a Japanese product and totally stripped out the head of a Phillips fastener. I raised both hands. I recently found out why I stripped them out. Because they aren't Phillips screws. They are JIS.

    Japanese Industrial Standard fasteners look almost like a Phillips, but are totally different inside. Here are two links with pictures and drawings and descriptions of probably the same thing happening that has happened to us:

    https://www.webbikeworld.com/jis-screwdrivers/

    https://revlimiter.net/blog/2014/09/...-screwdrivers/

    Sorry that both links kind of turn into sales pitches for tools. The amazing thing to me is that only a few companies make JIS drivers. With several million Japanese made vehicles being sold in our country every year. One would think that Snap-On or one of the other big tool places would at least offer a single driver. Not that I could find they don't. I asked my Snap-On Industrial rep about them and he said he had never heard of them.

    Not in any way M715 related, but I would imagine each of us have something with JIS at home. Car, generator, lawnmower, boat, motorcycle, etc... Think about how many times a stripped out JIS fastener on something has been replaced with a metric Phillips from the local hardware store because we didn't know better.

    Now we know.
    Remember if you didn't build it you can't call it yours.

    6.2 powered M715, 5 M1009's, M416, 2 M101's, 2 M105's, 3 M35's, M1007 6.5 turbo Suburban project called Cowdog.

    https://www.youtube.com/channel/UCCz...HGkBCfhXZ5iuaw

  2. #2

    Default

    Quote Originally Posted by Barrman View Post
    Raise your hand if you have ever worked on a Japanese product and totally stripped out the head of a Phillips fastener. I raised both hands. I recently found out why I stripped them out. Because they aren't Phillips screws. They are JIS.

    Japanese Industrial Standard fasteners look almost like a Phillips, but are totally different inside. Here are two links with pictures and drawings and descriptions of probably the same thing happening that has happened to us:

    https://www.webbikeworld.com/jis-screwdrivers/

    https://revlimiter.net/blog/2014/09/...-screwdrivers/



    Sorry that both links kind of turn into sales pitches for tools. The amazing thing to me is that only a few companies make JIS drivers. With several million Japanese made vehicles being sold in our country every year. One would think that Snap-On or one of the other big tool places would at least offer a single driver. Not that I could find they don't. I asked my Snap-On Industrial rep about them and he said he had never heard of them.

    Not in any way M715 related, but I would imagine each of us have something with JIS at home. Car, generator, lawnmower, boat, motorcycle, etc... Think about how many times a stripped out JIS fastener on something has been replaced with a metric Phillips from the local hardware store because we didn't know better.

    Now we know.
    Learned that in the '70's on a Honda Z50. The little hash marks between the grooves is the tip-off.

  3. #3

    Default

    Are these like the Posi-drive heads that have the little grooves between the 4 big grooves?

  4. #4
    Join Date
    Dec 2003
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    Giddings, Texas
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    Default

    I also destroyed fasteners on a Honda Z50 and CT70.

    Steve, there is a dot or little x on JIS fasteners.
    Remember if you didn't build it you can't call it yours.

    6.2 powered M715, 5 M1009's, M416, 2 M101's, 2 M105's, 3 M35's, M1007 6.5 turbo Suburban project called Cowdog.

    https://www.youtube.com/channel/UCCz...HGkBCfhXZ5iuaw

  5. #5

    Default

    ok. I have seen the dot on phillips screw heads. Never knew what it meant.

  6. #6
    Join Date
    Sep 1998
    Location
    North Central Wisconsin
    Posts
    11,520

    Default

    My brother tried to tech me this when he had his 280Z...I thought he was goofy and that they were the same...course since he worked as a mechanic, I should have at least tried to listen...thanks for bringing it up...reminds me to tell him I was wrong...
    Lord send your Holy Ghost into our hearts and make the desire of our hearts Your Will.

    Pro-choice, that's a LIE, babies don't choose to die!!

  7. #7

    Default

    Quote Originally Posted by Barrman View Post
    I also destroyed fasteners on a Honda Z50 and CT70.

    Steve, there is a dot or little x on JIS fasteners.
    That's it-- a dot. I stand corrected.

    The '70's were a long time ago...

  8. #8
    Join Date
    Sep 2012
    Location
    Anchorage, AK
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    414

    Default

    And sort of vaguely related to that-

    Impact screwdriver. $10, fits JIS or #2...supposedly.



    https://www.amazon.com/dp/B003BI8HHQ...v_ov_lig_dp_it

    Review:
    https://www.youtube.com/watch?v=jaRzZFLPKEY

  9. #9

    Default

    Quote Originally Posted by Subybaja View Post
    And sort of vaguely related to that-

    Impact screwdriver. $10, fits JIS or #2...supposedly.



    https://www.amazon.com/dp/B003BI8HHQ...v_ov_lig_dp_it

    Review:
    https://www.youtube.com/watch?v=jaRzZFLPKEY
    That's what you use after you've !@#$%'ed up the screws on a MiniTrail transmission case with a #3 Philips...

  10. #10
    Join Date
    Dec 2003
    Location
    Giddings, Texas
    Posts
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    Default

    Exactly!
    Remember if you didn't build it you can't call it yours.

    6.2 powered M715, 5 M1009's, M416, 2 M101's, 2 M105's, 3 M35's, M1007 6.5 turbo Suburban project called Cowdog.

    https://www.youtube.com/channel/UCCz...HGkBCfhXZ5iuaw

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