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Stainless Steel Wedges

Purchase Wedge Anchors


The stainless steel wedge is designed for use in solid concrete and should not be used in any other type of base material. Wedges are a mechanical expansion type concrete anchor and should only be used in dead load applications. They should not be used in vibratory or shock loading type of applications.


Stainless steel wedges are used in applications where rust resistance is required. The standard carbon steel wedges that are zinc or hot-dipped galvanized will not meet the rust-resistant requirements. The higher the grade of stainless steel, the better will be the results in terms of higher rust resistance. The 316 stainless steel provides the greatest rust resistance with the 304, followed by stainless steel with the 303 providing the least rust resistance of the three stainless steel wedges.

  • 303/304 Stainless Steel – wedges made from this type of stainless steel are suitable for outdoor applications where moisture is present.
  • 316 Stainless Steel – wedge anchors made from the 316 stainless steel can be used in applications where the anchor is submerged in water and in other chemicals, such as salt water or chlorine. It is very important that when using 316 stainless steel in submerged applications that all pertinent information is available and has been checked and certified.

Stainless Steel Wedge Sizes

The stainless steel wedge anchor description is designated with two numbers. The first number is the diameter and the second number is the length. The diameter is given as a fraction and the length is measured in inches as an overall length including the threads. Concrete Fastening Systems,  carries all diameters and lengths for both the 304 and 303 stainless steel wedges.

  303/304Stainless Steel 316 Stainless Steel
Diameter x Length Part # Part #
1/4” x 1-3/4” WAS14134 WAS-31614134
1/4” x 2-1/4” WAS14214 WAS-31614214
1/4” x 3-1/4” WAS14314 WAS-31614314
3/8” x 2-1/4” WAS38214 WAS-31638214
3/8” x 2-3/4” WAS38234 WAS-31638234
3/8” x 3” WAS383 WAS-316383
3/8” x 3-1/2” WAS38312 WAS-31638312
3/8” x 3-3/4” WAS38334 WAS-31638334
3/8” x 5” WAS385 WAS-316385
3/8” x 7” WAS387 WAS-316387
1/2” x 2-3/4” WAS12234 WAS-31612234
1/2” x 3-3/4” WAS12334 WAS-31612334
1/2” x 4-1/4” WAS12414 WAS-31612414
1/2” x 5-1/2” WAS12512 WAS-31612512
1/2” x 7” WAS127 WAS-316127
1/2” x 8-1/2” WAS12812 WAS-31612812
1/2” x 10” WAS1210 WAS-3161210
1/2” x 12” WAS1212 WAS-3161212
5/8” x 3-1/2” WAS58312 WAS-31658312
5/8” x 4-1/2” WAS58412 WAS-31658412
5/8” x 5” WAS585 WAS-316585
5/8” x 6” WAS586 WAS-316586
5/8” x 7” WAS587 WAS-316587
5/8” x 8-1/2” WAS58812 WAS-31658812
5/8” x 10 WAS5810 WAS-3165810
5/8” x 12” WAS5812 WAS-3165812
3/4” x 4-1/4” WAS34414 WAS-31634414
3/4” x 4-3/4” WAS34434 WAS-31634434
3/4” x 5-1/2" WAS34512 WAS-31634512
3/4” x 6-1/4” WAS34614 WAS-31634614
3/4” x 7 WAS347 WAS-316347
3/4” x 8-1/2” WAS34812 WAS-31634812
3/4” x 10” WAS3410 WAS-3163410
3/4” x 12” WAS3412 WAS-3163412
7/8” x 6” WAS786 WAS-316786
7/8” x 8” WAS788 WAS-316788
7/8” x 10” WAS7810 WAS-3167810
7/8” x 12” WAS7812 WAS-3167812
1” x 6” WAS16 WAS-31616
1” x 9” WAS19 WAS-31619
1” x 12” WAS112 WAS-316112
1-1/4” x 9” WAS1149 WAS-3161149
1-1/4” x 12” WAS11412 WAS-31611412


Each of the sizes of stainless steel wedges is packaged with the correct size and number of nuts and washers and are made from the same material as the wedge anchor. You can see how we ship to you by following this link.

Diameter to Use

The diameter of stainless steel wedge to use on any specific application depends on the holding value required, on the diameter of the hole in the fixture, and on any engineer-specified requirements.

Length to Use

The length of the stainless wedge to use can be determined by adding the thickness of the material being fastened to the minimum embedment plus space for the nut and washer.

Diameter of Wedge Minimum Embedment Thickness of Nut + Washer*
1/4” 1-1/8” 1/4”
5/16” 1-1/4” 5/16”
3/8” 1-1/2” 3/8”
1/2” 2-1/4” 1/2”
5/8” 3-1/4” 5/8”
3/4” 3-3/4” 3/4”
7/8” 3-7/8” 7/8”
1” 4-1/2” 1”
1-1/4” 5-1/2” 1-1/4”

*the thickness of the nut and washer is approximate and should be used as a rule of thumb, for exact thickness measure the nut and washer being used.

Torque Values

For the stainless steel wedge to obtain the proper holding values, each diameter must be torqued to a specified torque value range.

Diameter of Wedge Torque Value ft/lbs
1/4” 5-10
5/16” 10-15
3/8” 25-30
1/2” 50-60
5/8” 75-90
3/4” 150-175
7/8” 200-250
1” 250-300
1-1/4” 400-450

Stainless Steel Wedge Installation

  1. Drill a hole in the concrete using a hammer drill in the hammer mode, and using a carbide tipped drill bit that meets ANSI standard B212.15 which is the same diameter as the diameter of the stainless steel wedge anchor being installed.
  2. Drill the depth of the hole a minimum of 1/2” deeper than the minimum depth of embedment. Using a wire brush, compressed air or vacuum, clean the hole of all debris and dust.
  3. Thread the nut onto the threaded end of the stainless steel wedge. The top of the nut must be flush with the top of the stainless steel wedge to protect the threads from damage during installation.
  4. Insert wedge, clipped end first, into the predrilled hole in the concrete. If the wedge is being installed through a hole in a fixture, make sure that the hole diameter is larger than the diameter of the stainless steel wedge being used.
  5. With a hammer, strike the nutted end of the wedge until a minimum of 6 threads is below the surface of the concrete or the surface of the item being attached.
  6. Using your fingers, tighten the nut.
  7. Take a wrench and turn the nut clockwise 2 to 3 turns or until the proper torque values for the diameter of stainless steel wedge are being used is obtained.

Purchase Wedge Anchors

Jul 29th 2011 Bob Carlisle

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