Uploaded by Cassie Stefan Magsalay


Technology & Livelihood Education
Grade VIII
Name: _________________________
Screws are another kind of fastener which is stronger than nails. It is characterize as short,
slender, sharp-pointed metal pin in general with a raised helical thread running around it and a slotted
head. It is used to join things together by being rotated so that it pierces wood or other material and is held
tightly in place. Screws are driven by screwdriver and other related tools that fits to the head. In
purchasing screws, one has to remember that the measurement of the length of a flat screw differ from the
oval head screw. Length of a flathead screw is measured from the top of the head up to the tip as the head
will level to the surface of the wood. The measurement of the oval head screw is from the bottom of the
head until the tip of the thread as the will be exposed.
Common Types of Screws
1. Wood Screw – It is the most common type of screw. Wood screws aren’t made on the
actual wood. Rather, they are used to connect two or more solid wooden
objects. It has a sharp point to dig into the wood, making them highly
useful to woodworking applications.
2. Machine Screw – As the name suggest, it is used in machining applications. These
screws are unique because of their size. driven square or hex drive head. It features
coarse threads and a tapered point. It's typically much more heavy-duty than
conventional wood screws that are fitted with slotted heads.
3. Lag Screw- is a sturdy screw often with an externallydriven square or hex drive head. It
features coarse threads and a tapered point. It's typically much more heavyduty than conventional wood screws that are fitted with slotted heads.
4. Sheet Metal Screw - is a kind of hardware supply, which is used tightening metal
objects. This kind of fastener features a threaded shank along-with
a flat/rounded head. Unlike wooden rivets, which are threaded
only partially, the above mentioned screw's shank is entirely
5. Twinfast Screw - also known as particleboard screws. Have a coarse thread with twice
the thread pitch of standard wood screws,making it easy to drive them
into a variety of materials such as chipboard or various densities of
6. Security Screw - also known as tamperproof screws, are otherwise standard screws but
with a unique head, making it nearly impossible to remove with common tools. That
used to mean that any screw that couldn't be removed with a slot-style or Phillips head
driver could be considered a security screw.
Screw heads differ as to the kind of application or where the screws are to be used. It is
important that the kind of screw to be used will fit to work. Below are the different screw heads
to know when purchasing screw.
Drive is the formation of the head slot where the tool used in driving the screws is
inserted. It should be fit to the formation of the drive or else the drive of the screw will
deformed. The most common tool used to drive the screw is the screwdriver.
The Parts of a Screw
Miscellaneous Screws
Screw Eye
Hook & Eye
Cup Screw
Screw Hook
Miscellaneous screws are used in household/offices for hanging objects.
Instruction: Write your wrritten activity on this learning materials only. This activities will due on May
24, 2021. Please drop on the box in T.L.E. on or before the specified date.
1. Identify the tools used in driving screws and how they are used.
Name of Tool
How the Tool is Used
2. In a 12” x 12” hard material, Get a sample on the different kinds of screws including
the miscellaneous screws. Put a label on it.