COVID-19 Update:ABC US is an essential supplier to essential businesses in the hardware, construction and building materials channels across the United States and as such, we will continue to operate. We will adhere to requested health standards for our employees and continue to manufacture and supply SPAX® ENGINEERED FASTENERS to serve our essential customers in those respective industries from our facility in Bryan, OH. Visitors will be considered on an appointment-only basis. For any questions, please call 800-443-9602 between 8a-5p EST.

Unidrive Flat Head 304 Series Stainless Steel, Standard Thread


SPAX® 304 Series Stainless Steel Screws offer premium corrosion resistance and long-term aesthetics in wood deck/railing, fencing and other exterior wood applications.

  • Patented thread serrations require no pre-drilling and reduce driving torque to prolong the battery life of power tools
  • Ideal for use in cedar and redwood applications to prevent possible staining of the wood

Unidrive Flat Head

A patented MULTIhead design featuring ribs on the underside of the head facilitates a clean, flush or countersunk finish in wood and acts as a brake against metal hardware to prevent stripping out. For use with either a Phillips or Square Drive bit.

Base Part No.: 414700()

For CAD documents, please see Technical Documents.

SizeDrive/Bit SizeThreadAvailable Pkg. Options
Sm. PlasticLg. Plastic1 lb. Box3 lb. Box5 lb. BoxPer PieceContractor PackBulk PailProject PAX
#8 x 1-1/4"#2 Phillips/#2 Sq.Standard1090
#8 x 1-1/2"#2 Phillips/#2 Sq.Standard980
#8 x 2"#2 Phillips/#2 Sq.Standard865
#8 x 2-1/2"#2 Phillips/#2 Sq.Standard6
#10 x 2-1/2"#2 Phillips/#2 Sq.Standard645
#10 x 3"#2 Phillips/#2 Sq.Standard535
#10 x 3-1/2"#2 Phillips/#2 Sq.Standard530
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