Head Guide

Binder

Preferred design for making
a firm electrical connection.

Bugle


For use in drywall because it
distributes bearing stress over
a wider area than a flat head.

Fillister


Preferred for use in counter
bored holes.

82º Flat

Used when protrusion of the fastener
above the mating surface is
unacceptable.

82º Flat Undercut

When flat head is desired on shorter
length screws.

100º Flat

Preferred over the 82° variety when
fastening in soft materials.

Hex

Used in high volume assembly where
pneumatic tools drive the screw.

Hex Washer

Same advantages of hex head,
plus it offers greater protection to
mating surface.

Oval

Preferred over a flat head
when a more decorative look
is desired or when fastening
onto a conical surface.

Oval Undercut

Used when oval head is preferred
on screws of short lengths.

Pan

A very common style. Can be
substituted in most applications
for round, truss or binding heads.

Round

Sometimes preferred over a
pan head for its smooth
surface and appearance.

Round Washer

For designers wanting a
larger bearing surface with the
appearance of a round head.

Serrated (Hex or Pan)

Serration geometry is oriented
to resist loosening.

Trim

Preferred design when
attaching base board or trim.

Truss

Weaker than pan or round heads but
preferred in applications where minimal
clearance exists above the head.

Modified Truss

Offers low clearance and
an extra large bearing surface.
Commonly used to attach metal
lathe to metal studs.

Wafer Flat

Provides necessary bearing
surface and flush fit in wood and
softer materials.