Simpson ABL Anchor Bolt Locator with 5/8 in. Nut is engineered for the accurate and secure placement of anchor bolts on concrete-deck forms prior to concrete placement. The structural heavy-hex nut is attached to a pre-formed steel "chair," which eliminates the need for an additional nut on the bottom of the anchor bolt - simplifying the setup process and improving placement consistency from pour to pour. The chair carries a G90 galvanized finish for durability, while the heavy hex nut is made from uncoated steel.

Key Features

• Optimized chair geometry for concrete flow - the open design allows concrete to move freely around the anchor bolt base, reducing voids and improving pour quality.
• Installs with (2) nails or (2) screws - straightforward fastening to concrete-deck forms keeps the locator firmly in position before and during concrete placement.
• Provides 1 in. standoff (clear cover) for anchor bolts - the fixed 1 in. lift positions the bolt at a consistent, code-friendly depth without guesswork or additional spacers.
• Designed specifically for 5/8 in. anchor bolt diameter - the matched fit holds the bolt securely and eliminates play that could shift bolt location during the pour.
• Integrated heavy hex nut made from uncoated steel - the nut is pre-attached to the chair, removing the need for a separate bottom nut and cutting down on hardware and assembly time.
• Chair finished in Galvanized (G90) - the galvanized coating resists corrosion during outdoor concrete forming applications, extending service life in exposed conditions.

Why This Product

• One-piece design eliminates extra hardware - because the heavy hex nut comes pre-attached to the steel chair, crews avoid hunting for a separate bottom nut, which reduces parts on the job and speeds up anchor bolt prep.
• Consistent bolt positioning on every pour - the fixed 1 in. standoff height takes the variability out of anchor bolt placement, helping ensure bolts land at the same depth across an entire slab or foundation deck.
• Fast, tool-friendly installation - securing the locator with just two nails or two screws means it can be set quickly along a form layout without specialized tools or complicated procedures.
• Part of a complete anchor bolt locator system - Simpson's ABL series covers anchor rod diameters from 1/2 in. to 1-1/4 in., so this 5/8 in. model can be mixed with other sizes on the same project when multiple bolt diameters are required.

Specifications

• MPN: ABL5-1
• Anchor Bolt Diameter: 5/8 in.
• Standoff Height: 1 in.
• Nut Type: Heavy hex
• Nut Finish: Uncoated steel
• Chair Finish: Galvanized (G90)
• Installation Method: Installs with (2) nails or (2) screws
• Country of Origin: United States

Frequently Asked Questions

What size anchor bolt is the ABL5-1 designed to accommodate?

The ABL5-1 is specifically designed for a 5/8 in. anchor bolt diameter. Simpson's ABL series is available for anchor rod diameters ranging from 1/2 in. to 1-1/4 in.

How is the ABL5-1 anchor bolt locator installed?

The ABL5-1 installs with (2) nails or (2) screws, securing it to concrete-deck forms prior to concrete placement.

Does the ABL5-1 eliminate the need for a second nut on the anchor bolt?

Yes. The structural heavy-hex nut is attached directly to the pre-formed steel "chair," which eliminates the need for an additional nut on the bottom of the anchor bolt.

Is the ABL5-1 suitable for use with HDG anchor bolts?

Electro-galvanized versions of the ABL are available for use with HDG anchor bolts. The standard ABL5-1 features a heavy hex nut made from uncoated steel and a G90 galvanized chair.