A zinc plating provides corrosion resistance in wet environments. Also known as drop-in anchors, these are often used for overhead applications because the anchor's internal plug expands in four directions to hold the anchor firmly inside the hole before inserting a threaded rod or bolt. To install, place the anchor into the hole, insert the required installation tool (sold separately) into the anchor, and drive with a hammer until the thicker portion of the tool makes contact with the anchor. Pull-out strength and shear strength values are 25% of the ultimate values for normal-weight concrete.

Anchors can be installed below the base of the surface as well as flush with the surface. Use those with a coil thread to support temporary concrete formwork. Their threads are shallow and widely spaced for quick threading with a compatible rod or bolt. They are not for permanent applications.

Flanged anchors are easy to set in holes that are longer than the anchor. They sit flush with the surface when installed.

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

Strength, lbs.

Thread Size Lg. Drill Bit

Size Min.

Installation Dp. Dia. Thread

Dp. Pull-Out Shear Tested In Specifications Met Pkg.

Qty. Pkg.

Zinc-Plated Carbon Steel

Anchor with Coil Threads

1/2"-6 2" 5/8" 2" 5/8" 13/16" 1,440 1,600 4,000 psi Concrete FM Approved, UL Listed 1 97083A240 $3.72

3/4"-4 1/2 3 3/16" 1" 3 3/16" 1" 1 3/8" 2,350 3,920 4,000 psi Concrete FM Approved, UL Listed 1 97083A250 10.70

Anchor with UNC Threads

1/4"-20 1" 3/8" 1" 3/8" 7/16" 495 530 4,000 psi Concrete __ 25 97083A490 10.56

3/8"-16 1 9/16" 1/2" 1 9/16" 1/2" 5/8" 1,045 1,145 4,000 psi Concrete FM Approved, UL Listed 10 97083A510 7.16

1/2"-13 2" 5/8" 2" 5/8" 13/16" 1,440 1,600 4,000 psi Concrete FM Approved, UL Listed 10 97083A520 15.26

5/8"-11 2 1/2" 7/8" 2 1/2" 7/8" 1 3/16" 1,860 3,095 4,000 psi Concrete FM Approved, UL Listed 4 97083A530 18.06

3/4"-10 3 3/16" 1" 3 3/16" 1" 1 3/8" 2,350 3,920 4,000 psi Concrete FM Approved, UL Listed 1 97083A540 5.75

Flanged Anchor with UNC Threads

1/4"-20 5/8" 3/8" 5/8" 3/8" 3/8" 285 415 4,000 psi Concrete FM Approved, UL Listed 10 97083A260 8.16

1/4"-20 1" 3/8" 1" 3/8" 7/16" 495 530 4,000 psi Concrete FM Approved, UL Listed 10 97083A210 8.16

3/8"-16 3/4" 1/2" 3/4" 1/2" 13/32" 530 1,055 4,000 psi Concrete FM Approved, UL Listed 10 97083A270 8.58

3/8"-16 1 9/16" 1/2" 1 9/16" 1/2" 5/8" 1,045 1,145 4,000 psi Concrete FM Approved, UL Listed 10 97083A220 9.42

1/2"-13 1" 5/8" 1" 5/8" 5/8" 840 1,220 4,000 psi Concrete FM Approved, UL Listed 1 97083A280 3.10

1/2"-13 2" 5/8" 2" 5/8" 13/16" 1,440 1,600 4,000 psi Concrete FM Approved, UL Listed 5 97083A230 8.32