hese stud anchors strengthen the parts of buildings where steel framing connects to concrete. Weld them to the framing to help it adhere to the concrete and resist sheer forces. They have a head, so poured concrete embeds them solidly. Install them using conventional welding or specialized stud welders; a ferrule is included for use with stud welders. All anchors meet ASTM A108 material specifications and AWS D1.1 structural welding specifications. They’re also known as Nelson studs.

3D CAD models availableFor technical drawings and 3-D models, click on a part number.

Head

Length Diameter Height Ferrule

Material Tensile

Strength, psi Pull-Out

Strength Shear

Strength Specifications Met Pkg.

Qty. Pkg.

Low-Carbon Steel

1/4" Diameter

4 1/8" 1/2" 0.187" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 10 90578A621 $7.67

3/8" Diameter

2 1/8" 3/4" 0.281" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 10 90578A631 8.00

3 1/8" 3/4" 0.281" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 10 90578A632 8.67

4 1/8" 3/4" 0.281" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 10 90578A633 9.67

6 1/8" 3/4" 0.281" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 10 90578A634 12.67

1/2" Diameter

2 1/8" 1" 0.312" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 10 90578A641 11.00

3 1/8" 1" 0.312" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 10 90578A642 12.00

4 1/8" 1" 0.312" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 10 90578A643 13.67

5 5/16" 1" 0.312" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A644 8.33

6 1/8" 1" 0.312" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A645 8.83

8 1/8" 1" 0.312" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A646 13.67

5/8" Diameter

4 3/16" 1 1/4" 0.312" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A651 10.42

5 3/16" 1 1/4" 0.312" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A652 11.08

6 3/16" 1 1/4" 0.312" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A653 12.08

6 9/16" 1 1/4" 0.312" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A654 12.92

8 3/16" 1 1/4" 0.312" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 1 90578A655 3.22

3/4" Diameter

3 3/16" 1 1/4" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A661 11.67

3 3/8" 1 1/4" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A662 11.83

4 3/16" 1 1/4" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A663 12.83

4 3/8" 1 1/4" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A664 13.17

4 7/8" 1 1/4" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A665 13.83

5 3/16" 1 1/4" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A666 14.33

5 3/8" 1 1/4" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A667 14.67

5 7/8" 1 1/4" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A668 15.33

6 3/16" 1 1/4" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A669 15.83

8 3/16" 1 1/4" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 1 90578A671 3.73

9 3/16" 1 1/4" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 1 90578A672 4.03

7/8" Diameter

4 3/16" 1 3/8" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 5 90578A681 15.67

5 3/16" 1 3/8" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 1 90578A682 3.57

6 3/16" 1 3/8" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 1 90578A683 3.97

7 3/16" 1 3/8" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 1 90578A684 4.40

8 3/16" 1 3/8" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 1 90578A685 4.80

9 3/16" 1 3/8" 0.375" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 1 90578A686 5.30

1" Diameter

4 1/4" 1 5/8" 0.5" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 1 90578A691 4.30

6 1/4" 1 5/8" 0.5" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 1 90578A692 5.40

8 1/4" 1 5/8" 0.5" Ceramic 65,000 Not Rated Not Rated ASTM A108, AWS D1.1 1 90578A693 6.50

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