The Simpson HDIA Hollow Drop-In Internally Threaded Anchor by Simpson is a flush-mount expansion anchor engineered for attaching threaded rod to concrete and masonry overhead surfaces in mechanical, electrical, and fire protection installations. Its expansion design accommodates both hollow base materials - such as CMU and hollow-core plank - and solid base materials - including brick, normal-weight concrete, and lightweight concrete - giving contractors a single anchoring solution across a wide range of substrate conditions.

Key Features

• Broad material compatibility via expansion design - anchors reliably into CMU, hollow-core plank, brick, normal-weight concrete, and lightweight concrete, reducing the need for multiple anchor types on a single jobsite
• Internally threaded design - accepts a 5/8-in. threaded rod and allows the rod to be fully removed and reinserted after installation, making adjustments and future access straightforward
• Flush-mount profile - sits flush with the base material surface once set, keeping overhead installations clean and unobstructed
• Die-cast Zamac 3 alloy shell with carbon-steel cone - combines corrosion-resistant shell material with a hardened cone for consistent, reliable expansion during setting
• Compatible setting tool system - installs with the HDIASTH62 setting tool for hollow materials or the HDIASTS62 for solid materials, ensuring correct and consistent installation in either substrate type
• Suited for critical overhead applications - approved for suspending conduit, cable trays, pipe supports, fire sprinklers, and lighting fixtures from concrete and masonry overhead structures

Why This Product

• One anchor for hollow and solid substrates - the HDIA expansion anchor performs in CMU, hollow-core plank, brick, and both normal-weight and lightweight concrete, so crews can use a single anchor SKU across mixed-substrate projects without substituting products mid-job
• Threaded rod stays removable - because the anchor is internally threaded, the bolt or rod can be taken out and reinserted after initial installation, which is a practical advantage during phased construction or system maintenance
• Purpose-built for mechanical and electrical overhead work - the HDIA is specifically designed for the suspended load types most common in commercial construction: conduit, cable trays, pipe supports, fire sprinkler components, and suspended lighting
• Consistent installation with matched setting tools - Simpson offers dedicated setting tools for hollow and solid materials, helping ensure the anchor sets correctly and performs as designed regardless of which base material is overhead

Specifications

• Manufacturer: Simpson Strong-Tie
• MPN: HDIA62
• Rod Diameter: 5/8 in.
• Length: 2 in.
• Drill Bit Diameter: 1 in.
• Threads Per Inch (TPI): 11
• Shell Material: Die-cast Zamac 3 alloy
• Cone Material: Carbon steel
• Packaging: Packs of 25 and Cartons of 125

Approved Applications

• Suspending conduit and conduit hangers from concrete overhead structures
• Supporting cable trays in commercial and industrial environments
• Mounting pipe supports and mechanical system components
• Anchoring fire sprinkler system components to concrete ceilings
• Hanging suspended lighting fixtures from concrete or masonry overhead surfaces
• Use in CMU (concrete masonry unit) block and hollow-core plank base materials
• Use in solid base materials including brick, normal-weight concrete, and lightweight concrete

Frequently Asked Questions

What base materials is the Simpson HDIA62 compatible with?

The HDIA62 expansion design allows it to anchor into both hollow and solid base materials, including CMU, hollow-core plank, brick, normal-weight concrete, and lightweight concrete.

What setting tools are required to install the HDIA62?

Install with the HDIASTH62 setting tool for hollow materials or the HDIASTS62 setting tool for solid materials, depending on the base material being used.

What rod or bolt size does the Simpson HDIA62 accept?

The HDIA62 is internally threaded to accept a 5/8-inch diameter threaded rod with 11 threads per inch (TPI).

Can the bolt or threaded rod be removed after installation?

Yes. Because the HDIA62 is internally threaded, it allows for easy bolt or threaded rod removal without disturbing the installed anchor, making it convenient for installations that may require future adjustments.

Note: Product dimensions may differ from picture. Please see the item description above for specifications.