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Materials and Coatings Available

for Connectors for Wood Construction and Anchoring and Fastening Systems for Concrete and Masonry

updated 1/5/15

Simpson Strong-Tie® connectors, anchors and fasteners feature a wide range of materials and coatings designed to meet specific performance criteria. It is important to select a material and/or coating that is suitable for the intended application and environment based upon factors such as corrosion resistance and mechanical properties of the material. For more information on selecting connectors, anchors and fasteners based upon corrosion resistance, please see General Corrosion Risks, Guidelines for Selecting the Proper Materials and Coatings, Materials and Coatings Available – Connectors and Anchors, and Materials and Coatings Available – Fasteners for more information on selecting products based on corrosion resistance.

Note: Test results indicate that the coatings listed as medium level of corrosion resistance will perform adequately, subject to regular maintenance and periodic inspection. However, the test protocol followed was a modified version of the nationally recognized test method AWPA E12-94. This test method is an accelerated test, so data over an extended period of time is not available. Also noteworthy is that tests run in a laboratory may not correlate to service conditions.

Simpson Strong-Tie Company Inc. welcomes the opportunity to provide assistance in product selection, please call (800) 999-5099 in the event that technical support is needed. Not all products are available in all finishes.Contact Simpson Strong-Tie for product availability, ordering information and lead times.

Finish/Material Description Level of Corrosion Resistance
Gray Paint Water-based paint intended to protect the product while it is warehoused and in transit to the jobsite. Low
Powder Coating Baked on paint finish that is more durable than our standard paint and produces a better looking finished product. Low
Standard G90 Zinc Coating Zinc galvanized coating containing 0.90 oz. of zinc per square foot of surface area (total both sides). Low
Electrocoating utilizes electrical current to deposit the coating material on the fastener. After application, the coating is cured in an oven. Electrocoating provides a minimum amount of corrosion protection and is recommended for dry, non-corrosive applications only. Low
zmax-2008 Galvanized (G185) 1.85 oz. of zinc per square foot of surface area (hot-dip galvanized per ASTM A653 total both sides). These products require hot-dip galvanized fasteners or fasteners approved for use with ZMAX. Medium
hdg-2008 Products are hot-dip galvanized after fabrication (14 ga. and thicker). The coating weight increases with material thickness. The minimum average coating weight is 2.0 oz./ft2 (per ASTM A123 total both sides). These products require hot-dip galvanized fasteners (fasteners which meet the specifications of ASTM A153). Anchor bolts are hot-dip galvanized per ASTM F2329. Medium
Type 410 Stainless Steel with Protective Top Coat Carbon martensitic grade of stainless steel which is inherently magnetic, with an added protective top coat.  This material can be used in mild atmospheres and many mild chemical environments. Medium
Mechanically Galvanized,
Class 55
Simpson Strong-Tie Strong-Drive® SD Connector screw is manufactured with a mechanically-applied zinc coating in accordance with ASTM B695, Class 55 with a supplemental overcoat. These fasteners are compatible with painted and zinc-coated (G90 and ZMAX) connectors. Medium
Double-Barrier Coating Simpson Strong-Tie Strong-Drive SDS Heavy-Duty Connector screw is manufactured with two different finishes that together provide a level of corrosion protection that equals that provided by the previous HDG coating. Meidum
sst300-2008 Connectors are manufactured from Type 316L stainless steel, and provide greater durability against corrosion. Stainless-steel nails are required with stainless-steel products, and are available from Simpson Strong-Tie. High / Severe