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Hollow Drop-In Internally Threaded Anchor

Hollow Drop-In

The Simpson Strong-Tie® Hollow Drop-In Anchor (HDIA) is an internally threaded, flush-mount expansion anchor for use in hollow materials such as CMU and hollow-core plank, as well as in solid base materials such as brick, normal-weight and lightweight concrete.

Key Features

  • Suitable for suspending conduit, cable trays, pipe supports, fire sprinklers and suspended lighting into concrete
  • Expansion design allows HDIA to anchor into CMU, hollow-core plank, brick, normal-weight concrete and lightweight concrete
  • Internally threaded anchor allows for easy bolt removal

Material

Die-cast Zamac 3 alloy shell with carbon-steel cone or 304 stainless-steel cone

Installation

Installation Instructions — Solid Base (using solid setting tool)

  • Drill a hole in the base material using the appropriate diameter carbide drill bit as specified in the table. Drill the hole to the specified embedment depth.
  • Blow the hole clean using compressed air. Overhead installations need not be blown clean.
  • Insert the HDIA into hole. Tap with hammer until flush against surface.
  • Using the designated setting tool, drive the anchor to the bottom of the drilled hole. After the anchor reaches the bottom of the drilled hole, perform an additional 3 hammer blows against the setting tool to drive the anchor body over the cone.
  • Position fixture; insert fastener and tighten.

Installation Instructions — Hollow Base (using hollow setting tool)

  • Drill a hole in the base material using the appropriate diameter carbide drill bit as specified in the table.
  • Thread the HDIA onto the designated setting tool for hollow base materials.
  • Insert the HDIA into the hole. Tap the setting tool until the face of the tool contacts the surface.
  • Rotate the setting tool a minimum of 2 turns to set the anchor.
  • Remove the setting tool.
  • Position fixture; insert fastener and tighten.

Technical Information

Hollow Drop-In Design Information

Codes

  • Factory Mutual 3053987 (3/8" – 1/2" diameter)
  • Underwriters Laboratories EX3605 (3/8" – 1/2" diameter)

Related Links

Related Literature

Product Information Tables

Hollow Drop-In Anchor
Size Model No. Drill Bit Diameter (in.) Threads (per in.) Overall Anchor Length (in.) Quantity
Pkg. Quantity Carton Quantity
1/4" HDIA25 3/8 20 3/4 100 1600
1/4" HDIA25SS 3/8 20 3/4 100 1600
5/16" HDIA31 5/8 18 1 1/4 50 200
3/8" HDIA37 5/8 16 1 1/4 50 200
3/8" HDIA37SS 5/8 16 1 1/4 50 200
1/2" HDIA50 3/4 13 1 3/4 50 250
5/8" HDIA62 1 11 2 25 125