Shamelessly ripped off from here, looks like the primary reason why we still have "bad" screws (flat head and Phillips) is that the "better" types of screws are simply more difficult/expensive to manufacture: The reason for the different styles is cost and torque.
Why do they still make flat head screws?
Flat head screws are good for wood as they prevent overtightening and thus help prevent stripping.
What are Phillips flat head screws used for?
This screw is more commonly used with machinery, but you will usually find flat-head screws holding book shelf and lighting tracts to the wall or ceiling. They are also used in lighting fixtures and electrical outlets as well as holding hand rails, towel racks and toilet paper holders to the wall.
Why are Phillips head screws so common?
Because the Phillips screws integrate cross-shaped grooves over the head, it means builders have a greater surface area to work with. The grooves in the head make it easier to use a screwdriver, especially when you're forced to maneuver a fastener in tight spaces.
Why are there 2 different types of screw heads?
Answer: The primary reason for the wide variety of screw head drive types is to ensure the fact that you will never have the proper screwdriver close at hand when you need it.
33 related questions foundWhy are Phillips screwdrivers pointed?
Phillips screw heads allow a tighter fit than a flat head screw, which is why most factories and handymen use them. The screws tend to be lightweight and relatively small. The trick is to match your screwdriver to the type and size of screws you're using.
What is a Phillips head screwdriver?
Definition of Phillips-head screwdriver
: a screwdriver that is designed to be used with a type of screw (called a Phillips-head screw) that has a slot in its top that looks like a cross.
Who invented phillips head screw?
The Phillips screw and driver, originally invented by Portlander John P. Thompson, dramatically increased the speed of manufacturing and made the Phillips screwdriver a necessity in every toolbox.
Are Phillips screws designed to strip?
The popular myth that these screws were designed to cam out is simply untrue. This is a good ol' case of revisionist history that was used to sell more screws. The idea being that the screw would strip when unskilled laborers over tightened it, thus protecting the expensive machined parts.
Why do we use a flat screw driver in driving the head of a flat screw instead of a Philip screw driver?
Phillips screw heads allow a tighter fit than a flat head screw, which is why most factories and handymen use them. The screws tend to be lightweight and relatively small. The trick is to match your screwdriver to the type and size of screws you're using.
What is the difference between a Phillips screw and screwdriver?
At first glance, the main difference between a flathead screwdriver, or more properly called a slotted or flat blade screwdriver, and a Phillips screwdriver should be patently obvious. A flathead has a single blade, and a Phillips has two blades in the shape of a cross.
Why would you use a slotted screw?
Perhaps the biggest advantage of a screw with a slotted head is its simple design. Thanks to the straight slot going across the whole screw head, they can be fairly easily tightened even in cases when you don't have a screwdriver handy.
Why are star screws used?
Star Drive
The Star (also known as Torx) has a six-point, star-shaped drive that was developed mainly to enhance tamper resistance and ensure snug fits. The star design drivers cut down on the risk stripping the screw heads, slippage, or cam-outs, with tight, specific fits.
Why are there no Robertson screws in America?
Most historians attribute its lack of popularity in the United States to Henry Ford. Having been nearly bankrupted by shady European licensees, Robertson refused to license his invention to Ford. Without a guaranteed supply, Ford turned to the Phillips-head screw, cementing its reign in American industry.
What is flathead screwdriver?
A "slotted flat blade screwdriver" is a long standard hand-tool dating back to the 1500s. It has a flat-bladed tip used to turn, fasten or loosen screws and bolts. The flat blade screwdriver is an extremely versatile tool and is used for fasteners of all sizes, providing significant leverage.
What is a #2 Phillips screw?
The #2 is a 1/4" shaft, perfect for derailleur adjustment screws. It is the most common cross tip ("Phillips") required.
When did flat head screws come out?
In 1744, the flat-bladed bit for the carpenter's brace was invented, the precursor to the first simple screwdriver. Handheld screwdrivers first appeared after 1800.
How old are Phillips head screws?
In the early 1930s, the Phillips head screw was invented by Henry Phillips. Automobile manufacturers now used car assembly lines. They needed screws that could take greater torque and could provide tighter fastenings.
Why is it called a Robertson screwdriver?
The Robertson screwdriver, also known as a square screwdriver, was invented in 1908 by P.L. Robertson, a native Canadian.
Why are decking screws square?
Deck screws have square heads to increase the engagement of the driver bit in the head of the screw. This enables the screw to be driven in with less torque and less cam out, which will chew up the head of deck screws made from softer, corrosion-resistant metals. Screw extraction is also easier.
Why are decking screws different?
Deck screws are stronger than wood screws and are often made from copper or stainless steel. Their corrosion-resistant properties make them ideal for outdoor use. On the other hand, wood screws are mostly made from steel and have a flat head as well as an unthreaded shank that make strong joints.
Are Torx better than Phillips?
Phillips head screws were purposely designed to cam-out to prevent over-tightening. Torx heads were designed to resist cam-out, thereby offering improved torque transfer between the driver and the fastener. This feature also reduces wear on driver bits.
Do people still use slotted screws?
The slotted head screw (commonly but incorrectly called a flat head) is the oldest type of screw in use today. Now, they are mostly used for decorative purposes and have less “impact”. Many people think they are used on light switch covers still for this reason.
Why are hex screws better?
Hex screws provide better security than all the above screws dries. There are also tamper-resistant versions of hex screws. The tamper-resistant hex screws and design definition by ISO is there in the table. They are also a better choice when you are using a power tool.
Is Cross Point the same as Phillips?
Yes, there is such a thing as a crosspoint screwdriver-- it is a philips screwdriver without a point, and the screwheads are precisely machined to fit it. You can use a philips driver on them, but it'll slip-- and crosspoint screws tend to be case-hardened, so they'll mill a little ring into your screwdriver tip.
