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Tap-Flex® Thread-Forming Structural Screws

Tap-Flex® Thread-Forming Structural Screws are thread-forming, dual heat treated self-tapping fasteners that provide the strength, ductlity, and resistance to embrittlement failures required in critical curtain wall and dissimilar metal applications. Tap-Flex fasteners are designed to offer a replacement option for traditional nut and bolt assemblies. These fasteners provide an excellent solution for blind connections. The patented E-Form® segmented thread profile design improves installation and forms threads that provide increased thread engagement.

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Features & Specs

FEATURES

  • Eliminates thread-tapping operations and allows for blind installations (e.g. HSS)
  • High hardness lead threads for tapping into steel and aluminum
  • E-Form® thread profile overcomes friction build-up and reduces drive torque
  • Formed threads help resist loosening (e.g., vibration, thermal change)
  • Serrations on underside of hex washer head lock against the fixture
  • In the load-bearing area, a lower hardness heat treatment provides Grade 5 bolt mechanical properties, resulting in a fastener with increased ductility having no significant susceptibility to Hydrogen-Assisted Stress Corrosion Cracking (HASCC)
  • Stalgard® Plus Coating provides improved corrosion resistance as well as enhanced galvanic compatibility in dissimilar metal applications, including those involving aluminum, compared with fasteners with standard zinc plating
  • Fasteners coated with Stalgard PLUS typically show no red rust or other base metal corrosion on significant surfaces after 1500 hours of salt spray exposure in accordance with ASTM B117
  • Fasteners accept standard nuts and washers (if desired and/or required)

Specifications