5/8" x 3-1/2" Strong-Bolt® 2 Wedge Anchor 316 Stainless Steel STB2-623126SSR20, 20/Box

Simpson Strong-Tie



  • Chamfered top designed to prevent mushrooming during installation
  • Qualified for static and seismic loading conditions (seismic design categories A through F)
  • Suitable for horizontal, vertical and overhead applications
  • Standard (ANSI) fractional sizes: fits standard fixtures and installs with common drill bit and tool sizes
  • Tested per ACI355.2 and AC193
  • Size: 5/8 in. x 3-1/2 in.
  • Made from Type 316 stainless steel for long-lasting corrosion resistance
  • Quantity: 20
Products specifications
Bit Size5/8"
Minimum EmbedmentSee PDF
Box Qty20
Thread Type5/8" - 11
Material316 Stainless Steel
Minimum SpacingSee PDF
Minimum Edge DistanceSee PDF
Maximum Fixture ThicknessSee PDF
Minimum Fixture Hole Diameter (In Place)11/16"
Minimum Fixture Hole Diameter (Hole Spotted)5/8"
Length ID CodeE
Maximum Torque80 ft./lbs.
Wrench Size For Nut15/16"
Length MeasurementEnd to End
Brand NameSimpson Strong-Tie
* Values shown are average ultimate values and are offered only as a guide and are not guaranteed. A safety factor of 4:1 or 25% is generally accepted as a safe working load

The information on this page is intended for preliminary guidance only. For complete safety and to verify accurate information, please consult the (PDF linked below) to obtain the manufacturer’s values when selecting the anchors for your project.

Code listed for cracked and uncracked concrete, and masonry applications, the Simpson Strong-Tie® Strong-Bolt® 2 wedge-type expansion anchor is an optimal choice for high-performance even in seismic and high-wind conditions. Dual undercutting embossments on each clip segment enable secondary expansion should a crack form and intersect the anchor location; this feature significantly increases the ability of Strong-Bolt 2 to carry load if the hole expands. The Strong-Bolt 2 stainless-steel wedge-anchor offers long-lasting corrosion resistance for a wide variety of service environments.

Do not use an impact wrench to set or tighten the Strong-Bolt 2 anchor.
Caution: Oversized holes in the base material will make it difficult to set the anchor and will reduce the anchor’s load capacity.
  1. Drill a hole in the base material using a carbide drill bit the same diameter as the nominal diameter of the anchor to be installed. Drill the hole to the specified minimum hole depth, and blow it clean using compressed air. (Overhead installations need not be blown clean.) Alternatively, drill the hole deep enough to accommodate embedment depth and dust from drilling.
  2. Assemble the anchor with nut and washer so the top of the nut is flush with the top of the anchor. Place the anchor in the fixture, and drive it into the hole until the washer and nut are tight against the fixture.
  3. Tighten to the required installation torque.


Link Image Catalog PDF

Link Image Product Information (on Simpson Website)

Package information
7.87 in. x 3.54 in. x 3.54 in.,  0 lbs.

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Carton Reference 10707392018886

Pallet Reference 50707392018884