So you’re thinking, great, i’ll just get myself a JIS screw driver for those JIS screws.
If the screw that you are looking at doesnt have a dimple, is it likely that it was Made in Japan? If not, it is safe to assume it is not JIS. Therefore always assume that a screw is JIS if it has a dimple, but not the other way around. However it does happen that a screw may be a JIS but may not be indicated by a dimple or marking. JIS screws are most often identified by a dimple or an X on the screw head: Using one in the other will lead to frustration and a rounded out screws. From this point I will focus on JIS vs Phillips.Įven though the JIS and Phillips looks extremely similar, they are two different designs and the drivers are not meant to be interchangeable. There are many theories to why, such as dangers of over tightening on airplanes, or tool longevity, but never the less at one time or another everyone will experience a Phillips round-out as a function of its cam-out design.īoth JIS and Pozidrive are re-engineered standards that aim to reduce or eliminate cam-out. Phillips screws by design were created to cam-out a process in which the driver is meant to jump out of the screw when a certain torque was reached. The other is a pozidrive, but those are more commonly understood to be different. The most popular of which is the JIS (Japanese industrial standard), to which the JIS screwdriver is made to the JIS B 4633 specification. Most people don’t know that there are multiple screw types that look like the traditional Phillips.
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