Technical Specifications

Self-Drilling Screws

Reference Standard: ISO 10666:1999

MATERIAL / HEAT TREATMENT

Case hardening steel or heat treatable steel shall be used as the material for drilling screws. After that, self drilling screws are carbonitriding, quenching and tempering.


CASE DEPTH

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MICROSTRUCTURE

The microstructure of drilling screws shall not exhibit any ferrite streaks between the surface zone and the core after heat treatment.

MINIMUM TORSIONAL STRENGTH TAB

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DRILLING TIME
It is the used time for drilling, begin from the moment when the point comes into contact with the material until the moment the first screw thread penetrates.

MATERIAL OF TEST
Steel of low carbon content, cold rolling, 60 to 85 HRB hardness.

 

SEALING WASHERS

COMPOSITION

Material produced with EPDM compound: (Ethylene copolymer, propylene and diene).

The self-drilling system was developed for fixation in the outside of the work, being this fixation made both in lower as in upper part of the shingles. Therefore, one of the most important aspects of this system is in the sealing against water leak.

 

 

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