OT: When is a Phillips screw not a Phillips screw? - Mercedes-Benz Forum
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post #1 of 25 (permalink) Old 08-11-2019, 02:40 PM Thread Starter
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OT: When is a Phillips screw not a Phillips screw?

When it's a Japanese Industrial Standard crosshead screw.

For 20 years I've been routinely stripping the heads of "Phillips" screws on my Kawasaki and I've probably done a few on the Subaru too, being ignorant of the difference. Particularly annoying when trying to remove carb float bowls which have screws buried deep in the guts of a motorcycle.

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While this is not a Benz issue, I imagine some of you also have Japanese stuff to which this is pertinent. The problem occurs because of the amount of torque that gets applied to some rather small surface areas. If you've got a tool kit that came with your Japanese bike or car, the screwdriver in it will be a JIS screwdriver. You can use a JIS tool on a Phillips but you can't do vice versa without possibly stripping the screw.

I couldn't find any when I was last at Hazard Fraught Tools, so it doesn't look like the Chinese use them, but I'm only assuming. But you can make one out of a Phillips head one, courtesy of some Wing Nuts:

https://goldwingdocs.com/forum/viewt...p?f=16&t=15547
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post #2 of 25 (permalink) Old 08-11-2019, 03:30 PM
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Since I've never been called a professional "tool man", I regularly use the wrong tool for the job and have run into the differences you point out between Phillips and JIS heads. I could never understand why some of the drill screw heads in my toolbox sets fit while others didn't fit very well, if at all! The problem is I was never aware that there was a difference! Unfortunately, I'll still never be a professional "tool man", but thanks for the heads-up.
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post #3 of 25 (permalink) Old 08-11-2019, 04:28 PM
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post #4 of 25 (permalink) Old 08-11-2019, 05:57 PM
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Wait until you see aerospace screws.
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post #5 of 25 (permalink) Old 08-11-2019, 06:02 PM
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I have a Subaru automobile and a Suzuki motorcycle.

I own a set of JIS screwdrivers.

I use regular Philips screwdrivers on the Subaru.

I use JIS screwdrivers on the Suzuki.

Not all Japanese vehicles are fitted with JIS screws. I also have Honda, Mazda, and Toyota cars and Iíve owned Nissan in the past. All Philips. However the bikes get JIS.

Luckily Japanese bikes run really well and repairs are minimal. I wonder WTH the guys who own Hesketh motorcycles used ó imperial or metric or what? Heh.
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post #6 of 25 (permalink) Old 08-11-2019, 06:15 PM
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Here's another fly for the Phillips ointment. Pozidrive screws. They have been used by the auto industry for decades.
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post #7 of 25 (permalink) Old 08-11-2019, 06:19 PM
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Quote:
Originally Posted by roncallo View Post
Wait until you see aerospace screws.
LOL.
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post #8 of 25 (permalink) Old 08-11-2019, 06:21 PM
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Let's not forget Frearson & Pozidriv! And there are quite a few more.

But a quick way to tell if you're dealing with a Phillips or JIS is the JIS will have a single dot or an "X" to one side of the cross slot. Learned that real quick after stripping a few on a Mazda.
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post #9 of 25 (permalink) Old 08-11-2019, 06:22 PM
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APEX #2....or any of the APEX phillips.

The most reliable bits...fits both.

Will even remove an Airbus MorTorq screw if persuaded.


https://www.instructables.com/id/Whe...ot-a-Phillips/
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post #10 of 25 (permalink) Old 08-11-2019, 07:40 PM
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Navy taught me that one is Phillips and the other is Reid & Prince.
I hate 'em both, give me hex/allen or torx.
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