We use cookies on this site to enhance your user experience. By clicking "I AGREE" below, you are giving your consent for us to set cookies. Privacy Policy

text.skipToContent text.skipToNavigation

Hollow Drop-In Internally Threaded Anchor

Hollow Drop-In

On This Page

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)
  1. 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.
  2. Blow the hole clean using compressed air. Overhead installations need not be blown clean.
  3. Insert the HDIA into hole. Tap with hammer until flush against surface.
  4. 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 three hammer blows against the setting tool to drive the anchor body over the cone.
  5. Position fixture; insert fastener and tighten.
    Installation Instructions — Hollow Base (using hollow setting tool)
  1. Drill a hole in the base material using the appropriate diameter carbide drill bit as specified in the table.
  2. Thread the HDIA onto the designated setting tool for hollow base materials.
  3. Insert the HDIA into the hole. Tap the setting tool until the face of the tool contacts the surface.
  4. Rotate the setting tool a minimum of two turns to set the anchor.
  5. Remove the setting tool.
  6. Position fixture; insert fastener and tighten.

Related Literature

2019–2021 Product Guide — Anchoring, Fastening Systems and Restoration Solutions for Concrete and Masonry
S-A-PG19
A product guide for Simpson Strong-Tie® providing information on adhesives, mechanical anchors, direct fastening, carbide drill bits, and concrete restoration products, for concrete and masonry.
Product Guide
Anchoring, Fastening, Restoration and Strengthening Systems for Concrete and Masonry
C-A-2021
An informative and comprehensive catalog of products belonging to our anchoring, fastening, restoration and strengthening systems for concrete and masonry.
Catalog
Sistemas de anclaje, sujeción y restauración para concreto y mampostería
C-A-2018SP
Un catálogo completo de productos e información para los sistemas de anclaje, sujeción y restauración para concreto y mampostería.
Catalog
2019–2021 Guía de productos - Anclaje, sistemas de sujeción y soluciones de restauración para concreto y mampostería
S-A-PG19SP
Guía de productos para Simpson Strong-Tie® con información sobre anclajes adhesivos, anclajes mecánicos, sujeción directa, brocas de carburo y productos para restauración para concreto y mampostería.
Product Guide
Tension Performance of Post-Installed Anchors Adjacent to Abandoned Holes
L-A-ABANHOLE19
This letter is intended to address the performance of Simpson Strong-Tie® post-installed concrete anchors in normal-weight concrete when installed adjacent to holes that have been abandoned.
Engineering Letter
Safety Data Sheet for Mechanical Anchors
SDS-MechAnchors-NA-ENG-0520
Intended to provide information for use in workplace chemical management; information such as physical properties; hazards; protective measures; precautions for handling, storing, and transportation.
SDS
Ficha de Datos de Seguridad para Anclas Mecánicas
SDS-MechAnchors-NA-ES
Diseñado para dar información útil en la gestión de químicos en el lugar de trabajo; p.ej. propiedades físicas; riesgos; medidas de protección; precauciones para manejo, almacenamiento y transporte.
SDS
Fiche de Données de Sécurité pour Ancrages Mécaniques
SDS-MechAnchors-NA-FRCA
Prévu pour fournir de l’information sur la gestion des produits chimiques au travail comme propriétés physiques, dangers, mesures de protection et précautions de manipulation, stockage et transport.
SDS

Product Information Table

Fastener Production Information and Stuff & Things
Model No. Drill Bit Dia. (in.) Length (in.) Rod Dia. (in.) TPI Box Qty. Carton Qty.
HDIA25SS 3/8 3/4 1/4 20 100 1600
HDIA37SS 5/8 1 1/4 3/8 16 50 200
HDIA25 3/8 3/4 1/4 20 100 1600
HDIA31 5/8 1 1/4 5/16 18 50 200
HDIA37 5/8 1 1/4 3/8 16 50 200
HDIA50 3/4 1 3/4 1/2 13 50 250
HDIA62 1 2 5/8 11 25 125

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

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT

Related Products