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SKU: STB2-62812MGF20
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Simpson 5/8" x 8-1/2" Strong Bolt 2 Fully Assembled Wedge Anchor - Mechanically Galvanized, Pkg 20

Diameters

1/4" 3/8" 1/2" 5/8" 3/4"

Lengths

2-3/4" 3" 3-1/4" 3-1/2" 3-3/4" 4-1/4" 4-1/2" 4-3/4" 5" 5-1/2" 6" 6-1/4" 7" 8-1/2" 10" 12"
$12799
Ships Nov 12 when you order now

Description

Simpson Strong-Tie’s Strong-Bolt 2 Wedge Anchors in a mechanically galvanized finish are engineered for high-performance anchoring in cracked and uncracked concrete. These anchors are ICC-ES ESR-3037 code-listed and designed to handle seismic, wind, and static loads with confidence. The mechanical galvanizing provides robust corrosion resistance, making them ideal for outdoor, industrial, and mildly corrosive environments.

Each anchor is fully assembled with a nut and washer, ready for quick installation across a wide range of structural and non-structural concrete applications.

Key Features

  • ICC-ES Code Approved: ESR-3037 compliant for cracked and uncracked concrete, seismic zones, and high-load scenarios.
  • Mechanically Galvanized Finish: Provides excellent corrosion protection—ideal for outdoor or damp environments.
  • High Holding Power: Specialized expansion clip delivers consistent expansion and secure load transfer, even under dynamic forces.
  • Fully Threaded (Most Sizes): Allows maximum flexibility for varying fixture thicknesses.
  • Stamped Identification: Head markings simplify inspection and jobsite compliance.

Common Applications

  • Structural steel connections
  • Tilt-up wall panels
  • Pipe racks and mechanical systems
  • Seismic bracing and supports
  • Equipment anchoring and base plates

Installation Instructions

  1. Drill a hole in concrete using a carbide-tipped bit matching the anchor’s nominal diameter.
  2. Clean out the hole thoroughly to remove debris and dust.
  3. Insert the anchor through the fixture and into the hole until the washer contacts the base material.
  4. Tighten the nut to the recommended torque to fully expand and set the anchor.

California Residents: WARNING

Mechanical Anchors from Simpson Strong-Tie — Innovative and Trusted

Specifications
Diameter: 5/8"
Length: 8-1/2"
Thread Length: 4-15/16"
Fixture Hole Size: 11/16"
Drill Bit Size: 5/8"
Wrench Size: 15/16"
Material: Carbon Steel
Finish: Mechanically Galvanized
Installation Torque: 60 ft. lbf.
Manufacturer Name: Simpson Strong-Tie
Quantity: 20
Additional Info:
Anchor Body Material: Mechanically Galvanized
Nut Material: ASTM A563, Grade A
Washer Material: ASTM F844
Clip Material: ASTM A 568

Reviews
(6)

Customer Reviews

Based on 6 reviews
83%
(5)
17%
(1)
0%
(0)
0%
(0)
0%
(0)
J
JOSEPH VINCENT
Steel columns on 10” concrete slab.

Ordered two boxes (20 total) of 3/4” x 6” concrete lags. They are coated. Meaning less expensive than lure stainless. Regardless, these worked just as good. I will buy again.

F
FS Builders of Janesville
Great service!

Pricing was great, I received my shipment within 3 days! Everytime I have used them it has been a great experience.

N
Neal Hornaday
Fast and prompt

Fast and prompt delivery. Item was exactly what I needed. No one else in town carried that length.

J
Jeremiah Aguilera
Great Product!

I work for the State of Hawaii government. This is a great product at a great price and will be used at our state harbors. Shipping was fast, pricing was great, and I am very pleased. Mahalo Fasteners Plus!

J
JOE
Anchors

Received materials five days from ordering and everything was there. Constant updates on the delivery was nice. We will definitely order again

Payment & Security

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Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
  • Wedge anchor installed in wooden beams on a concrete floor

    Wedge Anchors - For Your Concrete Anchor Needs

    Because they provide strong, permanent holds once installed, wedge anchors are a go-to choice in both commercial construction and industrial settings. Once seated properly in the concrete wedge anchors provide a strong and permanent hold.

  • Metal base plate with wedge anchors on a concrete surface

    Versatile Applications, Endless Possibilities

    Offering a reliable design - featuring a threaded stud, expansion clip, and nut - making them suitable for a wide range of applications, from structural steel connections and machinery anchoring to shelving, racking and safety barriers.

  • Hand holding a wedge anchor against a black background

    Made of High Quality and Durable Materials

    Concrete wedge anchors come in various materials, such as zinc-plated steel, stainless steel, hot-dip galvanized and mechanically galvanized versions, allowing for use in different environments, including those with moisture or corrosive exposure.

Broad selection, fast delivery

Our footprint

Our nationwide network of distribution facilities offers more product selection and faster delivery times. So far we’ve made remarkable progress in our expansion efforts, effectively doubling our capacity by adding a new 47,000 sq. ft. warehouse in Simpsonville, South Carolina, in addition to our existing 60,000 sq. ft. facility in Urbana, Iowa.

Broad selection, fast delivery

Our experience

We pride ourselves on delivering a user-friendly, high quality experience online and over the phone. Our knowledgeable team of experts is readily available via phone to assist with product questions and custom pricing inquiries. We’re available Monday thru Friday from 7:00 AM – 5:00 PM CST. We look forward to supporting you on your next job.

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