Spax HCR-X Flat Head Exterior/Deck Screw - this new HCR-X coating offers 10 times higher corrosion protection in the neutral salt-spray fog test than is required by the standard for conventional yellow zinc coating, and has considerably higher surface hardness. This makes it ideal for outdoor use in structures such as decks, carports, pergolas, etc which are not directly exposed to the elements. The HCR-X coating is free from chromium-VI and therefore more eco-friendly to manufacture and use. For now, only the construction screws in sizes #8, #9 and #10 are available in HCR-X. Screws in the #12 and #14 ranges are still available with standard (green) HCR coating. For extreme exposures (non-structural) or use with Redwood or Cedar, stainless steel fasteners should still be used. Click on photos to enlarge. Grey/silver HCR-X coating (NOT for use with redwood or cedar...can cause staining)

• Self drilling heads (no pre-drilling required)
• Torx (T-star plus) head for better bit engagement with the screws
• Patented multi head countersinks the screw head flush in wood
• New SPAX HCR-X coating system offers superior corrosion resistance
• Not for use with redwood or cedar (stainless steel is recommended for use with these woods)