3/8" x 5" Strong-Bolt® 2 Wedge Anchor Mechanically Galvanized STB2-37500MGR50, 50/Box

Simpson Strong-Tie



  • Chamfered top designed to prevent mushrooming during installation
  • Suitable for horizontal, vertical and overhead applications
  • Tested for minimum concrete thickness of 3-1/4 inches
  • Standard (ANSI) fractional sizes: fits standard fixtures and installs with common drill bit and tool sizes
  • Tested per ACI355.2 and AC193
  • Size: 3/8 in. x 5 in.
  • Mechanically galvanized
  • Quantity: 50 per package
Products specifications
Bit Size3/8"
Minimum EmbedmentSee PDF
Box Qty50
Thread Type3/8" - 16
MaterialMechanically Galvanized
Minimum SpacingSee PDF
Minimum Edge DistanceSee PDF
Maximum Fixture ThicknessSee PDF
Minimum Fixture Hole Diameter (In Place)7/16"
Minimum Fixture Hole Diameter (Hole Spotted)3/8"
Length ID CodeH
Maximum Torque30 ft./lbs.
Wrench Size For Nut9/16"
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.

The Simpson Strong-Tie® Strong-Bolt® 2 wedge-type expansion anchor in a mechanically galvanized finish can be used where a high-load-resisting anchor is needed for exterior applications. It has the same dual undercutting embossments on each clip segment as the zinc-electroplated version. Suitable for horizontal, vertical and overhead applications, the STB2-MG anchor is tested in uncracked concrete in accordance with AC193 and also in uncracked masonry in accordance with AC01.

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.,  9 lbs.

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Carton Reference 10707392021336

Pallet Reference 50707392021334