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DIE POINT: One of the
least expensive pointing operations applied
at the time of heading. This operation
provides an end chamfer starting with
a diameter smaller than the root diameter
of the thread. The minimum reduction of
the point is approximately 10% below the
maximum minor diameter with an included
angle of 40 to 50.
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DOG POINT: A straight
pointed section reduced in diameter slightly
below the root diameter of the thread,
usually extending in length about two-thirds
the diameter of the thread. Recommended
for ease in starting, to insure against
stripping fine threaded products, and
to increase efficiency along production
lines.
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ROLLED POINT: An efficient
method of producing pointed long studs
or long screws with an end chamfer similar
to the Die Point. The last thread and
a half is slightly cupped by the thread
roll-over operation.
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PINCH POINT (ROUNDED):
An inexpensive method of applying a 40°,
60° or 90° lead-in point having
a slightly rounded contour but with pinch-off
marks on its surface. Used for aligning
several sheets or assembling several parts
requiring pilot action.
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NAIL POINT (PINCHED):
Usually supplied with an approximate 45°
included angle having a sharp point and
slightly squared surface. Used for impinging
or locking against wood or other soft
material. Other degrees of included angle
and sharpness also available.
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CUPPED POINT: A special
cup section supplied on the end of the
threaded member having a depression in
the end to reduce the area in contact
with the surface which increases its holding
and locking power under pressure.
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ROUND POINT: A dome-like
rounded surface applied to the end of
a threaded member in order to offer pressure
without disfigurement. Used for adjusting
members where friction without cutting
action is desirable.
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CONE POINT: A precision
forming operation to provide any required
included angle. Offers a smooth surface,
accurate length, and a sharp point which
can be produced to any desired contour
to fit your particular requirements.
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TYPE A POINT: A thread
forming screw for use in thin metal .015
to .050 thick. Used with drilled, punched
or nested holes in sheet metal, resin
impregnated plywood, asbestos combinations,
among others. Not recommended for new
design.
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TYPE B POINT: A thread
forming screw for use in heavier metal
.050 to .200 thick. Larger root diameter
with finer thread pitch for light and
heavy sheet metal non-ferrous castings,
plastics, impregnated plywoods, asbestos
combinations, and other materials.
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TYPE AB POINT: A thread
forming screw combining locating type
point of Type A with thread size and pitch
of Type B. Normal limitations of Type
B apply.
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TYPE C POINT: A thread
forming screw with either coarse or fine
pitch machine screw thread and blunt tapered
point. Eliminates chips and permits replacement
with standard screw in the field. Higher
driving torque required. Usable in heavy
sheet metal and die castings.
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TYPE U POINT: A thread
forming screw with high Helix thread for
driving or hammering into sheet metal,
castings, fiber or plastics for permanent,
quick assemblies.
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TYPE F POINT: A thread
cutting screw with machine screw thread
with blunt tapered point, having multi-cutting
edges and chip cavities. For heavy gauge
sheet metal aluminum, zinc and lead die
castings, cast iron, brass and plastic.
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TYPE FZ POINT: A thread
cutting screw with a tapping screw thread
with blunt tapered point and multi-cutting
edges and chip cavities. For plastics,
die castings, metal clad and resin impregnated
plywoods, and asbestos.
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TYPE 1 POINT: A thread
cutting screw with single flute for general
use. Produces a fine standard machine
screw thread for field replacement.
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TYPE 17 POINT: A thread
cutting screw for wood with a coarse tapping
screw thread and a special long sharp
point fluted to capture chips.
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TYPE 23 POINT: A thread
cutting screw in the fine thread series
offering maximum thread cutting area and
excellent chip clearing, with minimum
tightening torques.
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TYPE 25 POINT: A thread
cutting screw similar to Type 23 point
except with coarse Type B thread. For
plastics and other soft materials with
large chip clearing and cutting edges.
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SELF-DRILLING: With
special drilling points – lengths
– diameters that will drill through
¼” metal. Eliminates all
hole preparation – drills faster
than a drill. No punching, drilling or
tapping required. Reduces die costs.
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SELF-DRILLING: Produces
more secure sheet metal assemblies faster…used
as self-drilling screw or driving thru
pre-punched holes. Can be used with or
without pilot holes. Positive rake “forward
cutting edge" drills straight thru
sheet metal at peak speed. Perfectly mated
threads increase strip and back out pressures.
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