Ultimate Value Charts
Screws driven into steel were driven with three exposed threads on the off side of the connection,
then pulled out with testing machine.
Note that all results were obtained in strict adherence to ASTM protocol.
These ultimate figures are offered only as a guide and are not guaranteed.
A 4:1 safety ratio is recommended.
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Installation Guidelines
Screwgun with torque adjustment. Overdriving may result in fastener failure or strikeout of the work surface.
The fastener is fully seated when the head's bearing surface is flush with the material being attached.