Elco Tap-Flex Fasteners

Increased thread engagement with strength and ductility

These thread-forming screws are dual heat treated, self-tapping fasteners that provide the strength, ductility, and resistance to embrittlement failures required in critical curtain wall and dissimilar metal applications.

Tap-Flex® screws are threadformers with the patent-pending E-form® segmented thread profile. This design improves both installation and in-place performance:

Decreases thread-forming torque, easing starting and placement
Overcomes friction build-up and reduces drive torque
Increases thread engagement, so it resists back-out and loosening caused by vibration or thermal changes

Features and Benefits

Eliminates thread-tapping operations
E-Form® configuration overcomes friction build-up and reduces drive torque
Roll forms own work-hardened thread to resist loosening cause by vibration or thermal changes
Provides enhanced pull-out performance
Well-suited for metal applications such as steel and aluminum
Flex Technology heat treat provides required strength and ductility
Virtually immune to delayed embrittlement failures
Stalgard GB coating provides 1000 hours of salt spray resistance (per ASTM B117)
Accept standard nuts and washers if required