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3/8" x 3-3/4" Red Head Trubolt 316 Stainless Steel Wedge Anchor, 50/Box

   Availability: In Stock
  Questions? Email Mike

$247.64 per Box of 50
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Purchase ITW Red Head Trubolt 3/8" x 3-3/4" Red Head Trubolt 316 Stainless Steel Wedge Anchor directly online; shipping is free and fast.
SKU: SWW3836
  MFG: ITW/RedHead®


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ITW/RedHead® - 3/8" x 3-3/4" Red Head Trubolt (three one six) 316 Stainless Steel Wedge Anchor

The 3/8" x 3-3/4" Red Head Trubolt (three one six) 316 Stainless Steel Wedge Anchor (50 pcs per box) are designed for attaching to concrete. Each order is shipped complete the same day that it is received, and will arrive in 1 to 3 days.

  • Bit size 3/8"
  • Minimum embedment 1-1/2"
  • Thread Length 2-1/2"
  • 316 stainless steel for use in submerged, salt, and chlorine environments
  • Use in dead loads only
  • Packaged with 316 stainless steel nuts and washers
  • 3/8" diameter x 3-3/4" length
  • Minimum spacing between anchors is 5"
  • Free freight on all orders over $25.00
Products specifications
Bit Size 3/8"
Minimum Embedment 1-1/2"
Thread Length 2-1/2"
Thread Type 3/8" - 16
Type Male
Primary Concrete only
Diameter 3/8"
Length 3-3/4"
Material 316 Stainless Steel
Environment Submerged/Chemicals
Box Qty 50
Maximum Fixture Thickness 2-1/4"
Minimum Fixture Hole Diameter (In Place) 7/16"
Minimum Fixture Hole Diameter (Hole Spotted) 3/8"
Length ID Code E
Wrench Size For Nut 9/16"
Length Measurement End to End
Country American Made
Brand Name ITW/RedHead

The 3/8" x 3-3/4" Red Head Trubolt (three one six) 316 Stainless Steel Wedge Anchor is made from (three one six) 316 Stainless Steel. This anchor is designed for use in concrete only, and should never be used in block or brick base material.

The anchor is designed for use in a submerged, chemicals environment.

Hole Diameter/Bit Diameter
The anchor requires a 3/8" hole to be drilled in the base material (concrete only). The hole should be drilled with carbide tipped bit that meets ANSI standards and used in a hammer drill.

Diameter of Anchor
The diameter of the 3/8" x 3-3/4" Red Head Trubolt (three one six) 316 Stainless Steel Wedge Anchor is 3/8".

Length Anchor
The length of the anchor is 3-3/4", and is measured as an overall length of the anchor from end to end.

Thread Type
The threads on the anchor are national coarse threads that measures 3/8" with 16 threads per inch, commonly referred to as 3/8"-16.

Thread Length
The length of the threads on the anchor is 2-1/2" in length.

The anchor is packaged with 50 pieces per box and is packaged with the correct number and diameter of nuts and washers.

Minimum Embedment
The anchor minimum embedment into the concrete is 1-1/2". Therefore, the anchor must be installed so that a minimum of 1-1/2" of the anchor is embedded into the concrete.

Maximum Fixture Thickness
The maximum fixture thickness or the maximum thickness of the material being fastened for a anchor is 2-1/4". This will ensure that the minimum embedment of 1-1/2" will be met.

Fixture Hole Diameter
The hole in the fixture or material being fastened must be larger than the designated diameter of the anchor. The 3/8" diameter anchor requires the hole in the fixture to be 7/16".

Wrench Size
The size of the wrench required to turn the nut to set the anchor is 9/16".

Torque Value
The maximum torque that can be applied to the anchor once installed is 25 Ft./lbs.

Spacing between Anchors
Each anchor must be spaced a minimum distance of 5-1/4" from each other when measured center to center.

Edge Distance
It is very important not to install the anchor any closer than 2-5/8" from an unsupported edge of the concrete.

The anchor is stamped with the letter E on the threaded end to allow inspection of the anchor after installation. The letter "E" designates an overall length of the anchor as between 3-1/2" up to, but not including 4" in length.

Holding Values - Ultimate Load Values in 2000 PSI Concrete

anchor Size

Minimum Embedment

Pull-Out (lbs.)

Shear (lbs.)

3/8" x 3-3/4"




Product Information


Part number

Quantity per Box

3/8" x 3-3/4" Red Head Trubolt (three one six) 316 Stainless Steel Wedge Anchor



Installing a 3/8" x 3-3/4" Red Head Trubolt (three one six) 316 Stainless Steel Wedge Anchor
  1. Select a carbide drill bit with a diameter equal to the anchor diameter. Drill a hole at least 1/4” deeper than nominal anchor embedment.
  2. Clean hole with pressurized air or vacuum to remove any excess dust/debris.
  3. Using the washer and nut provided, assemble the anchor, leaving nut one half turn from the end of the anchor to protect threads. Drive anchor through fixture to be fastened until washer is flush to surface of fixture.
  4. Expand anchor by tightening nut to the specified setting torque – see torque table (approx3 to 5 full revolutions).
  5. Warning! Use in concrete ONLY. Not recommended for use in lightweight masonry such as block or brick.
  6. Warning! Always wear safety glasses and other necessary protective devices or apparel when installing or working with anchors.
  7. Caution: Use of core drills is not recommended to drill holes for use with this anchor.
  8. Do not use an impact wrench to set or tighten the anchor. Not recommended for use in concrete which has not had sufficient time to cure.
  9. The use of carbide drill bits manufactured with ANSI B212.15 drill bit diameter requirements is recommended for installation of this anchor. Anchor spacing and edge distance (anchor installation locations) are the responsibility of the engineer of record.
  10. Installing product in oversized hole is not recommended. Product will not set properly or achieve full designed load in oversized hole.

3/8" x 3-3/4" 316 stainless steel wedge anchor - concrete - mail box


* The figures above indicate average ultimate tension and shear failure values. A safety factor of 4:1 or 25% of ultimate value is generally accepted as a safe working load. Reference should always be made to applicable codes.

These bits work with the selected anchor
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