#12 ZAC® SD3 Metal Self-Drill Screw, Zinc Alloy Capped HWH (5/16") | ZSD3-12-CHW5/16

• Zinc alloy cap head that will never red rust
• Precision cold forged assuring superior strength and the fastest drilling time performance
• Designed to have low driving and thread engagement torque and provide maximum clamp load
• Special long pilot length to accommodate nested purlins
• Assembled EPDM sealing washer for a consistent weather tight seal
• Long life fastener limited warranty

Metal panel to light and medium gauge metal application

• Install fasteners with 0–2000 rpm screw gun equipped with depth sensing nose piece.
• Fastener length should provide for a minimum of 3/16" penetration of fully developed threads into metal substrate.
• Use of impact guns or hammer drills is not recommended.