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SKU: 3523140828404

Tubes of CSA Screws for Torx head connectors - Stainless steel

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A4 Marine Grade Screws for Secure Fixing of Stainless Steel Connectors to Timber

The Simpson Strong-Tie CSA-S connector screw is engineered from A4 marine grade stainless steel and designed specifically for use with Simpson stainless steel connectors. Optimised for solid timber and engineered wood applications, these screws deliver superior holding power, corrosion resistance, and secure fitment in connector holes, making them ideal for structural and outdoor use.

Find it in the Solid Wood Application >

 

Key Features

  • A4 Marine Grade Stainless Steel
    Provides exceptional corrosion resistance, making these screws suitable for coastal, humid, or chemically aggressive environments.

  • ETA Approved
    Certified under ETA-04/0013, ensuring compliance with European technical standards for load-bearing timber connectors.

  • Conical Head Design
    The underside of the screw head is shaped to ensure full surface contact with the connector hole, allowing for optimum load transfer between screw and fitting.

  • 6-Lobe (Torx T-20) Drive
    Provides a secure fit with minimal cam-out during driving, improving speed and control during installation.

  • Type 17 Point
    Pre-drills into timber as it drives, reducing the risk of splitting, especially in dense or brittle woods.

Benefits

  • Optimised for Simpson Stainless Steel Connectors
    Specifically developed to maintain the published load-bearing capacities of stainless steel hangers, brackets, and straps.

  • Stronger Fixed Connections
    Larger cross-bearing capacity than standard screws, enabling secure structural performance in timber-to-connector fixings.

  • Ideal for Harsh Conditions
    A4 grade stainless steel makes these screws suitable for exterior, marine, or chemically exposed environments.

  • Professional Finish and Fit
    Precision head design aligns perfectly with Simpson Strong-Tie connectors, enhancing both appearance and structural performance.

Material Specification

Specification Detail
Product Code CSA-S
Material A4 Marine Grade Stainless Steel
Drive Type Torx T-20 (6-lobe)
Point Type Type 17 Self-drilling
Certification ETA-04/0013
Head Design Conical under-head for flush fit
Packaging 250 screws per box






CSA-S Main Image.jpg

Product Details

Images

CSA-S Prod image.jpg
CSA-S_gallery.jpg
ebc-situation-2.jpg (previously ABC)
Connect timber battens.
QDBPC50E-kit-image.png

Applications

  • Fixing stainless steel joist hangers to timber

  • Attaching angle brackets and restraint straps in timber structures

  • Suitable for:

    • Solid wood

    • Glued laminated timber

    • Composite lumber

  • Ideal for exterior and marine environments or where high corrosion resistance is essential

Important Notes

  • Always use the specified CSA-S screw type with Simpson stainless steel connectors to achieve rated load performance.

  • Do not substitute with zinc-coated or lower-grade screws in corrosive environments.

  • Pre-drilling may be required in very dense hardwoods despite the Type 17 point.