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Cupped
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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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Gimlet Point
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A gimlet point is a
threaded cone point usually having a point angle of 45
to 50 degrees. It is used on thread forming screws such
as Type "AB" sheet metal screws, wood screws and lag
screws. |
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Plain Sheared End
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The ends of a fastener
cut approximately flat and square to the axis, without
chamfer. |
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Self Drilling - Drill Point
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With special drilling
points-lengths-diameters that will drill through ?"
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 - Pierce Point
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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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Type - 17
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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
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A thread cutting screw in
the fine thread series offering maximum thread cutting
area and excellent chip clearing, with minimum
tightening torque. |
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Type - A
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A thread forming screw
for use in thin metal .015 to .50 thick. Used with drill,
punched or nested holes in sheet metal, resin
impregnated plywood, asbestos combinations, among
others. |
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Type - AB
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A thread forming screw
combining locating type point of Type A with larger root
diameter and finer thread pitch for light and heavy
sheet metal, nonferrous castings, plastics, impregnated
plywood, asbestos combinations, and other materials.
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