Simpson Strong-Tie® 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. Please see Fastener Corrosion Information and Minimum Coating or Material Recommendation for more information on selecting fasteners based upon corrosion resistance.

Simpson Strong-Tie Company Inc. welcomes the opportunity to provide assistance in fastener selection, please call (800) 999-5099 in the event that technical support is needed.

top Low Level of Corrosion Resistance

Clear Zinc
Electroplated clear zinc is applied in accordance with ASTM F1941. In the ASTM B117 salt spray test clear zinc provides 36 hours of protection before the first appearance of red rust.

Electrocoating (E-Coat™)
Electrocoating utilizes electrical current to deposit the coating material on the fastener. After application the coating is cured an oven. Electrocoating provides a minimum amount of corrosion protection and is intended for dry, non-corrosive applications only.

Gray Phosphate
Gray phosphate provides a minimum amount of corrosion protection and is intended for dry, non-corrosive applications only.

Black Phosphate
Black phosphate provides a minimum amount of corrosion protection and is intended for dry non-corrosive applications only.

Heavy Zinc Electroplate
Electroplated zinc applied to a thickness in accordance with ASTM A641, Class 1 with a supplementary overcoat.

Yellow Zinc
Electroplated zinc applied in accordance with ASTM F1941. In the ASTM B117 salt spray test yellow zinc provides 24 hours of protection before the first appearance of red rust.

410 Stainless Steel
410 stainless steel is a low-carbon martensitic grade of stainless steel and is inherently magnetic. This material resists corrosion in mild atmospheres and many mild chemical environments.

top Medium Level of Corrosion Resistance

 C-3 Mechanically Galvanized
Mechanically-applied zinc with a minimum of 20% tin in accordance with Australian Standard AS3566.2. In the ASTM B117 salt spray test mechanically galvanized C3 has less than 0.1% of surface red rust at 1000 hours.

 N2000® Mechanically Galvanized
N2000 mechanical galvanization consists of a proprietary zinc alloy coating with a supplementary overcoat. In the ASTM B117 salt spray test mechanically galvanized N2000 has less than 10% of surface red rust at 950 hours. N2000 is a registered trademark Mechanical Galv. Plating Corporation

 Quik Guard®
Quik Guard is a proprietary double-barrier coating that consists of an electrodeposited base layer with organic paint layer. In the ASTM B117 salt spray test Quik Guard has less than 10% of surface red rust at 950 hours.

 Class 55 Mechanically Galvanized
Mechanically-applied zinc in accordance with ASTM B695, Class 55 with a supplementary overcoat. Mechanically galvanized, Class 55 fasteners are compliant with the 2006 International Residential Code® (R319.3) and the 2009 International Residential Code (R317.3)

 Hot-Dip Galvanized, ASTM A-153
Hot-dip galvanization that meets the standards of ASTM A-153. Hot-dip galvanized fasteners have a minimum of 1.0 oz/ft of coating. Hot-dip galvanized fasteners are compliant with the 2006 International Residential Code® (R319.3), 2006 International Building Code® (2304.9.5), 2009 International Residential Code® (R317.3) and the 2009 International Building Code® (2304.9.5.1).

 Double Barrier
The Simpson Strong-Tie double-barrier coating is a proprietary two-layer coating that provides a level of corrosion protection that is equivalent to ASTM A-153 hot-dip galvanization.

Teal-Arrow Icon
This icon identifies coated fasteners that Simpson Strong-Tie classifies as possessing a medium level of corrosion resistance, making them suitable for use in some exterior and corrosive environments and with some preservative-treated woods. For applications in higher-exposure applications, type-300 series stainless-steel fasteners should be considered for superior corrosion resistance. See corrosion information and material recommendations for more information.

top High Level of Corrosion Resistance

Types 304 and 305 Stainless Steel
Types 304 and 305 stainless steels are nickel chromium austenitic grades of stainless steel and are inherently non-magnetic. Fasteners made from types 304 and 305 stainless steel are compliant with the 2006 International Residential Code® (R319.3), 2006 International Building Code® (2304.9.5), 2009 International Residential Code® (R317.3) and the 2009 International Building Code® (2304.9.5.1).

Types 304 and 305 stainless steel are not hardened by heat treatment and provide very good corrosion protection.

Type 316 Stainless Steel
Type 316 stainless steel is a nickel chromium austenitic grade of stainless steel with 2-3% molybdenum and is inherently non-magnetic. Fasteners made from type 316 stainless steel are compliant with the 2006 International Residential Code® (R319.3), 2006 International Building Code® (2304.9.5), 2009 International Residential Code® (R317.3) and the 2009 International Building Code® (2304.9.5.1).

Type 316 stainless steel is not hardened by heat treatment and provides the highest level of corrosion protection available, especially in environments with chlorides.

Copper
The copper used for the manufacture of fasteners contains a minimum of 98% copper in accordance with ASTM F1667. Copper fasteners are compliant with the 2006 International Residential Code® (R319.3), 2006 International Building Code® (2304.9.5), 2009 International Residential Code® (R317.3) and the 2009 International Building Code® (2304.9.5.1).

Silicon Bronze
Silicon Bronze is a copper alloy with silicon used as an alloying element. Fastener made from silicon bronze are compliant with the 2006 International Residential Code® (R319.3), 2006 International Building Code® (2304.9.5), 2009 International Residential Code® (R317.3) and the 2009 International Building Code® (2304.9.5.1).

N2000® is a registered trademark of Mechanical Galv. Plating Corporation.