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Anchors & Concrete Fixings · Trade series (Hilti HDA-T) · Application guide

What Are Hilti HDA-T Self-Undercutting Mechanical Anchors Used For?

Typical applications, the industries that specify hilti hda-t self-undercutting mechanical anchors, and how to choose the right size, material and finish for the joint.

Hilti HDA-T Self-Undercutting Mechanical Anchors are used for self-undercutting threaded anchorage in existing concrete. They are manufactured to Trade series (Hilti HDA-T), and selection is driven by the thread size, the fit and tolerance the assembly requires, and the service environment.

Primary duty
Self-undercutting threaded anchorage in existing concrete
Governing standard
Trade series (Hilti HDA-T)
Thread size range
M10 to M20
Category
Anchors & Concrete Fixings

Application notes are general engineering guidance. Verify the property class and any approval requirement against your own design calculation.

What Are Hilti HDA-T Self-Undercutting Mechanical Anchors Used For? application image

The primary duty of Hilti HDA-T Self-Undercutting Mechanical Anchors is self-undercutting threaded anchorage in existing concrete. Below: the sectors that specify them in volume, the checklist used to select the right size and material for the application, installation notes, and the known limits of the type. Stocked across roughly M10 to M20, they cover general to heavy-duty work.

Typical Applications for Hilti HDA-T Self-Undercutting Mechanical Anchors

The most common settings where these are specified:

  • Concrete base plates: post-installed threaded anchors for steel columns and equipment frames.
  • Bridge retrofit: removable structural attachments in existing cracked concrete.
  • Plant installation: machine hold-downs where edge distance needs design control.
  • Infrastructure maintenance: anchored rails, barriers and brackets in existing concrete.

How to Specify Hilti HDA-T Self-Undercutting Mechanical Anchors for Your Application

  • Size: Match the nominal size to the mating thread or hole. This product spans M10–M20; check the full table below for the exact dimensions of each size.
  • Material: Choose the material and finish for the service environment — plated steel for general use, stainless for corrosion resistance.
  • Environment: For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
  • Standard: This product is supplied to Trade series (Hilti HDA-T). Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

Where Hilti HDA-T Self-Undercutting Mechanical Anchors Are Not the Right Choice

Match the fastener to the load, environment and whether the joint must be reopened; the wrong class or style is the usual cause of joint failure.

Technical Drawing

Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.

Sends the selected values to the quote form below.

Request a Quote

The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.

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Specification
Business Information

Dimensions & Specifications (Trade series (Hilti HDA-T))

Anchor sizeAvailable embedment options (mm)Maximum fixture thickness options (mm)FinishBase materialLoad cases
M10100 / 125 / 190 / 25020 / 30 / 40 / 50 / 60 / 100electro-zinc plated, minimum 5 u00b5mcracked and non-cracked concretestatic / dynamic / seismic
M12100 / 125 / 190 / 25020 / 30 / 40 / 50 / 60 / 100electro-zinc plated, minimum 5 u00b5mcracked and non-cracked concretestatic / dynamic / seismic
M16100 / 125 / 190 / 25020 / 30 / 40 / 50 / 60 / 100electro-zinc plated, minimum 5 u00b5mcracked and non-cracked concretestatic / dynamic / seismic
M20100 / 125 / 190 / 25020 / 30 / 40 / 50 / 60 / 100electro-zinc plated, minimum 5 u00b5mcracked and non-cracked concretestatic / dynamic / seismic
Inside the plant

Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

  1. Wire rod feeding into a cold heading machine
    01

    Cold heading

    Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.

    Head dimensions and under-head radius checked at set-up and per shift.

  2. Thread rolling machine producing bolt threads
    02

    Thread rolling

    Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.

    Go / no-go ring gauges to ISO 965 tolerance class 6g.

  3. Baskets of bolts staged for heat treatment
    03

    Heat treatment

    Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.

    Core hardness and tensile tested per lot to ISO 898-1.

  4. Zinc plated bolts in a treatment basket
    04

    Surface treatment

    Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.

    Coating thickness and neutral salt spray hours to ISO 9227.

Frequently Asked Questions

How do I choose the right size of Hilti HDA-T Self-Undercutting Mechanical Anchors?

Match the nominal size to the mating thread or hole. This product is available from M10 to M20; the full dimension table on this page lists each size.

What material should Hilti HDA-T Self-Undercutting Mechanical Anchors be for outdoor use?

For damp, coastal or chemical environments specify A4 (316) stainless or a suitably coated steel. For indoor or dry use, A2 (304) stainless or zinc-plated steel is normally adequate.

Are Hilti HDA-T Self-Undercutting Mechanical Anchors made to a recognized standard?

Yes — they are manufactured to Trade series (Hilti HDA-T), so dimensions are interchangeable between suppliers when you quote the standard on your order.

What are Hilti HDA-T Self-Undercutting Mechanical Anchors used for?

Self-undercutting threaded anchorage in existing concrete. They are supplied to Trade series (Hilti HDA-T).

Can I get a quote for Hilti HDA-T Self-Undercutting Mechanical Anchors in the size and material I need?

Yes. Use the technical drawing and quote form on this page to set the size and options, then send the exact configuration to our team for pricing and lead time.