Screw Comparison
Guide - Screw Heads.
Use this Screw Comparison Chart to help choose the
right screw that best fits your application. Compare
Screw Heads,
Screw Threads and size for either
Interior or
Exterior applications.
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Here are top and side views of many of the
screw-head styles you’ll encounter. Top row, left
to right: flat head, flat head with a separate
finishing washer, washer head, and truss head.
Bottom row, left to right: round head, oval head,
pan head, fillister, and trim head.
You can buy screws with a variety of head styles
to meet specific project needs and can often
select the fastener with your favorite drive
system. Here’s a quick rundown on the uses for the
most popular types. |
Flat-Head Screws:
Probably the most common style and are used in a
wide variety of applications, from general
construction to fastening tiny hinges. The head is
typically flat with the surface of the wood, or it
can be driven into the bottom of a counterbore and
concealed with a plug. It’s also the right choice
to use with finishing washers.
Trim-Head Screws:
Look like finishing nails and can be used wherever
you need the holding power of a screw but also
require an unobtrusive look.
Round-Head Screw:
Gives you the broadened holding strength of a
washer under a screw head but without the
inconvenience of purchasing and handling a
separate piece of hardware. By spreading the
pressure, the washer-head screw avoids
concentrated stresses that could crack plastics or
damage thin wood products. |
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Oval-Head Screws:
Mount with their smooth top just above the wood’s
surface. This gives a decorative look and also
prevents the snags produced by flat-head screws
that aren’t fully countersunk. The oval head finds
extensive use holding trim to boats.
Pan-Head Screws:
Have a flat surface under the head that improves
holding power when you mount hardware such as
drawer slides. Using a screw diameter smaller than
the mounting hole in the hardware gives you some
adjustability.
Truss-head screws:
Feature an even larger washer surface for improved
holding power. Truss heads are excellent for
attaching false drawer fronts – large head hides
an oversized hole that permits adjustment. Truss
heads also provide excellent holding power when
driven through the thin plywood backs of
wall-mounted cabinets. |
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Excerpted from Taunton's Complete Illustrated
Guide to Hardware Copyright @2003
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Better Results!
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