Pay Attention To

  CONNECTED MATERIALS

– Point has to penetrate through fixture into base construction.

  DRILLING THICKNESS FOR STEEL

– Different self-drilling points have different drilling capacities. The most accurate drilling capacity can be got from certain screws manufacturer’s data.

  PILOT HOLES

– Some points need pilot holes, some points need pre-threaded holes.

Common Screw Points

Self-Tapping

Self tapping screw point

Self tapping screw point

Screw creates its own thread as it is driven into the material

For use in wood, thin metal, plastics, OSB, plywood and other materials

Self-Tapping screw can also be self-drilling when drilling tip is added

Self-Tapping screw can also be self-piercing when extra-sharp point is added

No need for pre-threaded holes or nuts

Without drilling tip, screws need drilled, punched or nested holes for harder surfaces

Self-piercing

Self piercing screw point

Self piercing screw point

One type of Self-Tapping screws

Same as Self-Tapping screw, but with extra-sharp point (25 to 30 degrees) that allow it to penetrate sheet metal

Screw creates its own thread as it is driven into the material

For use in thin metal, plastics, OSB, plywood and other materials

Screws are made from high-strength material

This type of screws are also called: sprint point, zip, saber point, needlepoint, speed point and twinfast screws.

Penetrate sheet metal

Gimlet Point

Fixing gimlet point

Fasteners gimlet point

Similar to Self-Tapping Point AB, but for wood

Screw creates its own thread as it is driven in to the material

For use in wood

No need for pre-threaded holes or nuts

Screws need pre-drilled holes

Type A

Self-Tapping Point

Type A self-tapping screw point

Type A self-tapping screw point

For use in thin metal, plastics, OSB, plywood and other materials

Needs drilled, punched or nested holes for more solid materials

Type AB

Self-Tapping Point

Type AB self-tapping screw point

Type AB self-tapping point example

Combining locating point of Type A with fine thread size and pitch of Type B

 For use in thicker metal, plastics, OSB, plywood and other materials

Larger root diameter than Type A

Needs pre-drilled, punched or nested holes for more solid materials

Type B

Self-Tapping Point

Type B self-tapping point example

Type B self-tapping point example

 For use in thicker metal

Finer thread pitch than Type A

Ends with a blunt point

Larger root diameter than Type A

Needs pre-drilled holes

Type 2

Self-Drilling Point

Type 2 self-drilling point example

Type 2 self-drilling point example

One type of Self-Tapping screws

Same as Self-Tapping screw, but has a drill-shaped point to cut through sheet metal or steel

Screws work as both a drill bit and a fastener.

Good at fastening thin pieces of metal together

 No need for drilling a pilot hole.

Type 3

Self-Drilling Point

Type 3 self-drilling point example

Type 3 self-drilling point example

One type of Self-Tapping screws

Same as Self-Tapping screw, but has a drill-shaped point to cut through sheet metal or steel

Screws work as both a drill bit and a fastener.

Good at fastening thin pieces of metal together

No need for drilling a pilot hole.

Type 4

Self-Drilling Point

Type 4 self-drilling point example

Type 4 self-drilling point with wings example

One type of Self-Tapping screws

Same as Self-Tapping screw, but has a drill-shaped point to cut through sheet metal or steel and thin wings wider than the thread

Screws work as both a drill bit and a fastener.

Thin wings cut a clearance hole in soft materials (such as wood or plastic), but are destroyed when drilling harder materials (such as metal)

Suitable for fastening soft materials with clearance holes into metal

No need for drilling a pilot hole.

Clearance drilling, tap drilling, thread tapping and fixing itself can happen in a single operation

Type 17

Threaded Cutting

Type 17 threaded cutting point example

Type 17 threaded cutting point example

One type of Self-Tapping screws

Same as Self-Tapping screw, but has a drill-shaped point

Recommended for use in wood, light plastics, and particle board

Point reduces torque and the likelihood of the timber splitting when the screw is inserted close to the edge

Point creates its own pilot hole limiting the need for pre-drilling

Do not need pre-drilled hole (depending on the wood)

Type 23

Threaded Cutting

Type 23 threaded cutting point example

Type 23 threaded cutting point example

Recommended for use in soft metals (zinc and aluminium castings), cast iron and plastics

  Provides maximum thread cutting area and good chip clearing, with minimum tightening torques

Needs pilot hole

Type 25

Threaded Cutting

Type 25 threaded cutting point example

Type 25 threaded cutting point example

Recommended for use with soft materials like plastics

Large chip clearing area and large cutting edges

Needs pilot hole

Type 1

Threaded Cutting

Type 1 threaded cutting point example

Type 1 threaded cutting point example

Recommended for steel parts having a thickness less than half of the screw diameter

With single cutting edge

 Needs pilot holes

Creates a fine standard machine screw thread

Needs pilot hole

Type F

Threaded Cutting

Type F threaded cutting point example

Type F threaded cutting point example

Multi cutting edges and chip cavities for installing thicker materials

 With machine screw thread

Recommended to use with thick sheet metal, aluminium, cast iron, brass and plastic.

Needs pilot hole

Flat Point

Flat point example

Flat point example

 Used with nuts or threaded holes