SCREWDRIVERS (JIS VS PHILLIPS) KNOW THE DIFFERENCE!

chief38

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OK - another screwdriver thread, but NOT a "gun screwdriver" thread!

Some or many do not know the difference between two similar screwdriver styles. The first being Phillips screwdriver bits and screws that we are all familiar with here in the USA. OK - but in Japan, they do not use Phillips screws, they use JIS screws. JIS stands for Japanese Industry Standard and is NOT the same! They are only slightly different, but different enough that if a Phillips screwdriver is used on a JIS screw, it will strip out very quickly. Maybe that is why you have been stripping out screw heads on products made in Japan and have not realized it. Any Japanese screws used in cars, motorcycles, electronics, equipment, tools etc. are the JIS style, not Phillips.

There is a Company called Vessel that makes and sells JIS screwdrivers. We do not need to go out and buy entire sets of them as the straight bladed screwdrivers are no different than ours. All most of us really need is one Vessel screwdriver which is about the size of our #2 Phillips. Maybe some of us need 1 smaller and 1 larger size as well for electronics, automotive or motorcycle work, but the vast majority of us can usually get by with just the one. They are under $10 bucks on Amazon and should be in everybody's tool box that is a DIYer.

Vessel makes these screwdrivers in many sizes,, impact versions and handle types. You can buy them in sets or like I said, one at a time. The really good news is that the JIS style will also work perfectly fine in Phillips type screws. Just not the other way around. I know JIS screws are exclusively used in Japan but I am unsure if they also use them in China, Korea, Vietnam, Taiwan and other Countries now making the lion's share of the products we buy. Still for under $10 is makes sense to get one of these Vessel screwdrivers to have on hand. After all, these imported JIS screws are not going away anytime soon! Personally, it bugs the hell out of me to have a brand new shinny product and strip out the screw heads when they have to be removed or retightened.

You can go on Youtube and type in "JIS vs Phillips" and learn to tell the difference between them. Again, Vessel is the Japanese manufacturer and they are readily available in the USA and on Amazon. Obviously I have no affiliation with them (so no skin in the game) but being the tool nut that I am, I'm into this stuff and wanted to pass it along.
 
Interesting to read. Now I know why my drill bit set is stripping my newly bought screws from Home Depot. I assumed my drill was set too strong or the screw metal was cheap. I thank you for the heads up and will adjust!!
 
One of the original purposes of the Phillips head design was to limit torque as the driver would slip out of the screw head once an excessive torque level was reached. That prevented overtightening of fasteners and snapping off screw heads. I knew the Japanese drivers were different from Phillips but never gave it much thought. Personally, I prefer Torx heads.
 
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I am not quite sure of that. I know the real JIS screws have a small dot on them to identify them as JIS. Knowing the Chinese and their ethics and how cheap they can knock stuff off - who knows!?

Think I’ll try one or two and look for that mark. Thanks.
 
One of the original purposes of the Philips head design was to limit torque as the driver would slip out of the screw head once an excessive torque level was reached. That prevented overtightening of fasteners and snapping off screw heads. I knew the Japanese drivers were different from Philips but never gave it much thought.

The real way not to strip out threads, over tighten and over torque is to learn "the proper feel". Letting a tool do that for you by slipping it's bit to slot fitment is not a good method to rely on - but yes you are correct in your post. So many have no idea just how tight is tight enough and what too tight or too lose "feels" like. It's a good skill to acquire. :)

On almost every item I have ever worked on I can tell if it was opened up prior to me seeing it - just by looking at the fasteners. There is only a small percentage of the time that a screw is not buggered up to some extent. When it's on a nice high quality item it bothers me even more.
 
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I've seen those screws but never gave them a thought. I just figured someone invented a new tool just to sell his newly invented drivers.
Roof top HVAC units are the worst after some guys think it's funny to use a cordless drill to over tighten the hex head screws for the panels, stripping out the hole. I don't think there's a tool made to prevent hacks from being hacks (Except a 3# hammer strategically dropped...)
 
Learn something new today. Thanks!


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There are a number of similar cross-head screw styles, along with the myriad of other heads. Fortunately most of us never have to deal with them!

When a Phillips Is Not a Phillips!


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There are some excellent JIS drivers available on Amazon, made by Vessel in Japan. I got a set for my neighbour's 16 y.o. son, who is into various engines, mostly Honda, for ATVs etc.
 
Or, you can do something we all have done: Wedge in whatever flat-head screwdriver you can find at the moment and hope for the best.:p:o;):D
 
Here's a tool that I find useful for the occasional weirdly shaped screwhead. (E.g., for tightening handles on some of our cooking pots and pans.)



Think I got the screwdriver bits off Amazon pretty cheap.

I have an inexpensive miniature set, too, that comes in handy for electronics and such.
 
BTW, re the JIS screwdrivers on Amazon - you can also get interchangeable bits that look like they will fit our 1/4" hex handles, but although the diameter is OK, the length of the very end - beyond groove where the ball bearing secures the bit - is longer and needs to be cut down a little. I don't have an unmodified bit that clearly shows it, but the JIS bit at the top of the pic has been shortened enough to fit my handle.

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Ononmea- I have one of those multi-bit sets, too and they are really handy when you encounter the various weird "security head" screws. For everything else, there's Mcmaster Carr.
 

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Screwed again

Thank you for bringing attention to
the JIS (Japanese Industrial Standard).
screw. I had no idea.

JIS Phillips screw = not the same as
U.S. Phillips, similar but will strip head.

Vessel Tools USA = JIS screwdrivers.

JIS screwdrivers works in U.S. Phillips type
screws. Just NOT the other way around.

Got it in my notes. Thanks again!
 
I'm keepin' the original Phillips head screws on my Custer era Colt SAA.
 
Having worked for a large Japanese company knew all about JIS. BTW they call them “ plus” or “ minus”.
More interesting screw, tooling ect is the DIN system used in Germany and Austria.
 

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