Fastener is designed to attach long-life metal roof panels such as GALVALUME to structural steel joists up to .500” thick.
5/16” Cupped HWH ZAMAC Zinc-Aluminum Alloy provides lifetime protection against red rust on the head & washer face. A written warranty is available upon
The head & washer face captures the rubber EPDM washer even when driven at an angle & are designed to maximize Pull over strength.
For structural steel applications, a screwgun with RPM under 2000 is recommended for best performance.