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INDEX® Concrete Screw Anchors

Heavy duty screws that are up to 45% faster to install.

INDEX® high-performance, certified direct concrete anchors are the most effective solution for professionals who need a quick, simple way to install structural and non-structural elements in cracked or uncracked concrete.

See range
INDEX bodegon TH TX 1

Range of concrete screws

rp atlantis c3 h
THE

THE

Hexagon head.
Atlantis C3-H coating

See
rp atlantis c3 h
THA

THA

Countersunk head.
Atlantis C3-H coating

See
rp atlantis c3 h
THP

THP

Pan head.
Atlantis C3-H coating
See
rp atlantis c3 h
THT

THT

Truss Head.
Atlantis C3-H coating

See
TFE

TFE

Hexagon Head.
Zinc-Plated coating

See
TFA

TFA

Countersunk head. Galvanised coating
See
TFP

TFP

Pan head.
Zinc-plated
See
TFT

TFT

Truss head.
Zinc-plated
See
TFN

TFN

Hexagon Head Without Washer.
Zinc-Plated coating

See
TFS

TFS

Fixing Stud.
Zinc-Plated coating
See
TFM

TFM

Male thread head.
Zinc-Plated coating

See
TFF

TFF

Femalethread head.
Zinc-Plated coating

See
TFY

TFY

TFY: Eyebolt head. Zinc plated
See
MAT INOX A4
TXA

TXA

Countersunk head with bimetal tip. Stainless steel coating A4
See
MAT INOX A4
TXE

TXE

Hexagonal head with bimetal tip. Stainless steel coating A4
See
MAT INOX A4
TXP

TXP

Pan head with bimetal tip. Stainless steel coating A4
See
MAT INOX A4
TXT

TXT

Truss head with bimetal tip. Stainless steel coating A4
See

Why are they the best solution? Let's explain.

19 versiones

19 different
varieties available

The range includes 9 different types of screw head, 3 surface finishes and various diameters to cater for a diverse range of applications, giving you enough flexibility and simplicity to help you choose the right solution, whatever the project you’re working on. Find out more

maxima proteccion

Surface coatings for maximum protection

These concrete anchor screws are available in three different finishes: A4 stainless steel, Atlantis C3-H and galvanised ≥5μm. These finishes provide guaranteed protection against wear and corrosion to extend the anchor's useful life, even in harsh environments. Find out more

prestaciones superiores

Greater maximum loads and reduced spacing distances

These concrete anchor screws can support greater maximum loads in cracked and uncracked concrete (C20/25 to C50/60). In addition, they can also be installed closer together or nearer to the edge of the concrete element. Find out more

tres profundidades

Up to three
installation depths

These concrete anchor screws can be installed at up to three different depths (Ø6 and Ø10 versions only), providing greater flexibility in a variety of scenarios. Find out more

desmontaje

Fully adjustable and removable

Concrete anchor screws can be loosened to suit the requirements of the element installed and are ideal for temporary installations where a clear surface is needed following disassembly.

instalacion express

Quick installation for greater efficiency

All you need is a drill and an impact driver. With no need for a torque wrench, they are much quicker and cheaper to install. Find out more

calidad index

INDEX® quality
guaranteed

Homologated products manufactured under rigorous quality controls, offering you the security and confidence you are looking for. Find out more

indexcal

Find them
on INDEXcal

If you use INDEXcal, the program for calculating anchor requirements according to Eurocode 2, Part 4, you can quickly and accurately find the details to check which anchor is most suitable for your project.

Maximum quality and safety guaranteed

These concrete anchor screws are certified according to the most demanding industry standards to guarantee secure, reliable fixings, including in critical or high-risk applications.

ETA 20/0046

ETA 20/0046 Option 1 certified for installation in cracked and uncracked concrete (C20/25-C50/60). See technical data sheet.

ETA 20/0494

ETA 20/0494 certified for non-structural redundant systems in concrete (≥ C20/25) and hollow-core slabs (≥ C30/37). See technical data sheet.

Fire resistance

Fire resistance class R30-R120 certification for anchors in concrete.

Sísmica C1&C2

C1 & C2 seismic approval for structural installations at risk of seismic movement.

Up to three installation depths

These concrete anchor screws can be installed at up to three different depths (Ø6 and Ø10 versions only), providing greater flexibility in a variety of scenarios.

dimensions views depths

THE 10 x 100 (example)

* In uncracked C20/25 concrete. The other measurements are approved for two installation depths.
Installation Fig. 1 Fig. 2 Fig. 3
hnom Installation depth 85 mm 75 mm 55 mm
Nrec Maximum tensile load recommended * 1.342 kg 1.095 kg 654 kg
Tfix Maximum fixture thickness 15 mm 25 mm 45 mm

Concrete anchor screw design and geometry

Patented double thread
Patented double thread designed to embed deeply in the concrete and provide guaranteed support for maximum loads.
Tempered tip
Tempered tip to guarantee maximum hardness, durability and ease of installation.
Body of high resistance steel
High-resistance embossed carbon steel body.
THE TFE Head Embossed ribbed
THE and TFE models feature hexagonal heads with a serrated flange to ensure tightness against the base materials and prevent the anchor from loosening.
TFF Head Female thread with double
TFF models feature a female thread and M8 / M10 double thread for use with threaded bar in concrete ceilings and hollow-core slabs. Suitable for suspending air conditioning ducts, cable trays or pipework.
TFM Head Male thread
TFM model features a head with male thread for fixing hose clamps in concrete or hollow-core slabs.
Head
Head with stamped measurement (except Ø5).
Bimetal version
Bimetal version with a hardened carbon steel tip for easier installation and an A4 stainless steel body for greater protection against corrosion.

Have you heard of BIMETAL technology?

Anchors made from A4 stainless steel and carbon steel

Bimetal Technology

Our TX models of concrete anchor screw are manufactured using BIMETAL technology, which provides high resistance to both wear and corrosion in situ thanks to the combination of stainless and carbon steel.

Features of A4 stainless steel

The anchor body is made of A4 stainless steel and is resistant against corrosion, oxidation and the harshest environmental conditions, up to corrosion level C5. It is suitable for applications in outdoor spaces such as coastal areas, outdoor spaces with high industrial contamination, areas near roads andtropical and subtropical regions.

Strength of carbon steel

The anchor tip is made of hardened carbon steel to withstand the friction and wear generated when installed in hard materials like concrete. The blue colour of the tip identifies the area where the fusion of both materials is produced.

Anchor for fastening structural and non-structural elements

Applications for ETA 20/0046 version (installations in cracked and uncracked concrete)

  • Structural applications
  • Awnings or temporary signage
  • Stadium seats
  • Wood to concrete structures Railings and fences
  • Shelves and racks
  • Structural beams and pillars

Applications for versions of non-structural installations (ETA 20/0494)

  • Fastening of tubes
  • Air conditioning conduits
  • Electrical trays or wiring systems
  • Installations in hollow concrete ceilings
  • Installations in hollow-core slab ceilings

Choose the perfect coating according to the corrosion level

C1 C2 C3 C4 C5
Pictograma RP Zincado Pictograma RP Atlantis C3 H Pictograma material Inoxidable A4
Indoors without condensation Indoors without condensation
Indoors with temporary condensation Indoors with temporary condensation
Outdoors in rural areas with very low contamination Outdoors in rural areas with very low contamination
Outdoors with low contamination Outdoors with low contamination
Outdoors with moderate concentration of contamination Outdoors with moderate concentration of contamination
Coastal areas Coastal areas
Outdoors with strong industrial contamination Outdoors with strong industrial contamination
Areas near roads Areas near roads
rp atlantis c3 h

Atlantis C3-H coating: valid for dry indoor conditions (50 years) or in C3-type outdoor environments according to ISO 9223, for a period of 25 years.

Zinc coating: suitable for use in dry indoor conditions (category C1 according to ISO 923), for a period of 50 years.

MAT INOX A4

A4 Stainless Steel: suitable for indoor and outdoor applications, in coastal areas, areas exposed to high pollution levels or areas near roads.

The experiences of professionals who already use INDEX® concrete anchor screws

personas 4.1

“As they are so easy to install, I spend 45% less time on installation”.

personas 4.4

“These anchors are perfect for temporary installations because they can be completely removed afterwards”.

personas 4.3

“They perform better because they support loads up to 100% heavier than expansion anchors”.

personas 4.2

“They make my work easier because I can use them in different materials at different depths”.

Learn with us

In this video we explain the types of concrete screws that exist, what they are used for, what their main advantages are and how to install them correctly following the instructions on the technical sheet.

Maximum performance and wide load values

We increased the maximum recommended loads in C20/25 uncracked concrete and C20/25 cracked concrete compared to the previous model.
Loads (kg) screw THE

Installation guide

Installation for ETA 20/0046 certified version (installations in cracked and uncracked concrete)

the paso 1
Step 1
the paso 2
Step 2
the paso 3
Step 3
the paso 4
Step 4
the paso 5
Step 5
the paso 6
End

Installation for versions for non-structural installations (ETA 20/0494)

tff paso 1
Step 1
tff paso 2
Step 2
tff paso 3
Step 3
tff paso 4
Step 4
tff paso 5
Step 5
tff paso 6
End

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TÉCNICAS EXPANSIVAS S.L. informs that the personal data provided voluntarily on this website will be processed and incorporated into the corresponding files, responsibility of TÉCNICAS EXPANSIVAS S.L, is reported at the time of personal data collection, although, according to the specific case, its purpose may be any of the following: attention to your referred request, complaint or question, established relationship maintenance, comprehensive and commercial customer management, accounting and billing or sending communications, including electronic media, news and activities related to TÉCNICAS EXPANSIVAS S.L.

The data in our files are strictly confidential and shall be treated with the utmost confidentiality and shall comply with all the requirements provided for the General Data Protection Regulation (GDPR) 2016.

According to Data Protection legislation, you are strongly advised not to send high-level personal data, such as those relating to health, as they are not encoded or encrypted. Should these details be sent, it is done so under your sole responsibility.

The user may at any time exercise their rights of access, rectification, cancellation and opposition under the provisions of the General Data Protection Regulation (GDPR) 2016 by sending a letter together with a photocopy of your ID, to P.I. La Portalada II | c/ Segador 13, 26006 | Logroño (La Rioja).
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Técnicas Expansivas S.L.

CIF: B-26220491

P. I. La Portalada II, C/ Segador, 13

26006 · Logroño (La Rioja) · SPAIN

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TECHNICAL TRAINING

Our engineering department provides specific and personalised training on the different topics related to fixing systems: metallic or chemical fixings, installation systems, regulations, calculations, etc.

 

TÉCNICAS EXPANSIVAS S.L. informs that the personal data provided voluntarily on this website will be processed and incorporated into the corresponding files, responsibility of TÉCNICAS EXPANSIVAS S.L, is reported at the time of personal data collection, although, according to the specific case, its purpose may be any of the following: attention to your referred request, complaint or question, established relationship maintenance, comprehensive and commercial customer management, accounting and billing or sending communications, including electronic media, news and activities related to TÉCNICAS EXPANSIVAS S.L.

The data in our files are strictly confidential and shall be treated with the utmost confidentiality and shall comply with all the requirements provided for the General Data Protection Regulation (GDPR) 2016.

According to Data Protection legislation, you are strongly advised not to send high-level personal data, such as those relating to health, as they are not encoded or encrypted. Should these details be sent, it is done so under your sole responsibility.

The user may at any time exercise their rights of access, rectification, cancellation and opposition under the provisions of the General Data Protection Regulation (GDPR) 2016 by sending a letter together with a photocopy of your ID, to P.I. La Portalada II | c/ Segador 13, 26006 | Logroño (La Rioja).
Read more

site visits

The relationship with our customers does not end with the sale of our products. At INDEX® we understand that it is often necessary to accompany them on site, where our experience is the best ally to ensure fits works perfectly. Our engineers and technicians support the managers of each project in planning and selecting the best solution for effectively saving time and money.

TÉCNICAS EXPANSIVAS S.L. informs that the personal data provided voluntarily on this website will be processed and incorporated into the corresponding files, responsibility of TÉCNICAS EXPANSIVAS S.L, is reported at the time of personal data collection, although, according to the specific case, its purpose may be any of the following: attention to your referred request, complaint or question, established relationship maintenance, comprehensive and commercial customer management, accounting and billing or sending communications, including electronic media, news and activities related to TÉCNICAS EXPANSIVAS S.L.

The data in our files are strictly confidential and shall be treated with the utmost confidentiality and shall comply with all the requirements provided for the General Data Protection Regulation (GDPR) 2016.

According to Data Protection legislation, you are strongly advised not to send high-level personal data, such as those relating to health, as they are not encoded or encrypted. Should these details be sent, it is done so under your sole responsibility.

The user may at any time exercise their rights of access, rectification, cancellation and opposition under the provisions of the General Data Protection Regulation (GDPR) 2016 by sending a letter together with a photocopy of your ID, to P.I. La Portalada II | c/ Segador 13, 26006 | Logroño (La Rioja).
Read more

ENGINEERING SERVICES AND CALCULATIONS

At INDEX® we want to offer our customers the most comprehensive service. In addition to providing them with the best fixing and anchor solutions, our team of specialised engineers technically advises all our customers. We also have powerful software tools to do any necessary calculations with total accuracy.

TÉCNICAS EXPANSIVAS S.L. informs that the personal data provided voluntarily on this website will be processed and incorporated into the corresponding files, responsibility of TÉCNICAS EXPANSIVAS S.L, is reported at the time of personal data collection, although, according to the specific case, its purpose may be any of the following: attention to your referred request, complaint or question, established relationship maintenance, comprehensive and commercial customer management, accounting and billing or sending communications, including electronic media, news and activities related to TÉCNICAS EXPANSIVAS S.L.

The data in our files are strictly confidential and shall be treated with the utmost confidentiality and shall comply with all the requirements provided for the General Data Protection Regulation (GDPR) 2016.

According to Data Protection legislation, you are strongly advised not to send high-level personal data, such as those relating to health, as they are not encoded or encrypted. Should these details be sent, it is done so under your sole responsibility.

The user may at any time exercise their rights of access, rectification, cancellation and opposition under the provisions of the General Data Protection Regulation (GDPR) 2016 by sending a letter together with a photocopy of your ID, to P.I. La Portalada II | c/ Segador 13, 26006 | Logroño (La Rioja).
Read more