TFE Concrete Screw

A direct-fastening, cold-galvanised concrete screw for cracked and non-cracked concrete, seismic C1-C2 and hollow-core / prestressed (Spancrete) slabs.

ETA1 — Cracked concreteETA6 — Hollow-coreSeismic C1-C2CSIC — SprinklersFire R120 (Efectis)

The Adit concrete-screw family

Same screw and same approvals — choose the coating and head for your environment and application.

Technical specification

Downloads

Proven in the field — selected projects in Israel

The TFE direct-fastening concrete screw is installed in hundreds of projects across Israel.

Shikun & Binui, Givat Shmuel Merlog Golf, Caesarea Fadlon building, Elkana Road 54 Shefayim parking Tidhar Tower, Netanya ACR Tower, Netanya

Instructional & field-test videos

What is a concrete screw?

The concrete screw is one of the smartest solutions in anchoring and construction. Unlike traditional anchors that need an external sleeve or a chemical resin, a direct-fastening concrete screw cuts its own thread straight into the walls of the drilled hole, creating a strong, precise mechanical lock — with no complicated preparation.

Its big advantages are speed, high precision and re-usability: the screw can be removed and returned to its place without harming the anchoring strength — a unique property with no substitute when anchoring formwork.

Approvals and standards — your ticket to safe construction

• ETA1 — cracked and non-cracked concrete: the most rigorous approval for mechanical anchors in Europe. Full approval for both cracked and non-cracked concrete.
• ETA6 — prestressed and hollow concrete: a unique approval for hollow-core (Spancrete) slabs, allowing direct anchoring without additional materials.
• Seismic C1-C2: critical in Israel as an active seismic zone; C1-C2 are the strictest anchoring requirements.
• CSIC — sprinklers: a certificate for official use anchoring fire-suppression systems, with full engineering liability.
• Fire resistance R120: approved by Efectis — maintains structural integrity and load-bearing capacity for two continuous hours.
• Load resistance: static, semi-static, dynamic and shock loads.

Applications — where are concrete screws used?

• Anchoring formwork: the ability to pull out and re-insert the screw makes it ideal for anchoring formwork legs.
• Overhead hanging: piping, electrical conduit and HVAC — installed in a single stroke, with no extra tools.
• Fire-suppression systems: sprinkler anchoring backed by the CSIC certificate.
• Hollow-core (Spancrete) slabs: direct anchoring to prestressed and hollow slabs backed by ETA6.
• Structural steel and railings: structural connections in cracked concrete, including seismic loads.
• Light anchoring: hanging signs, pictures and frames — fast and reliable, with no chemicals.

Range of heads — the TF series

Same screw, same approvals — in a range of heads for every application. All heads are available in the TH (Atlantis) coating and in TX stainless.

• TFT — thin (truss) head
• TFP — dome / button head
• TFA — countersunk head
• TFE — hex (socket) head
• TFM — combined threaded-rod head
• TFS — threaded-rod (stud) head
• TFF — female head
• TFJ — wide thin head

TFE for hollow-core (Spancrete) and prestressed concrete

The officially approved sizes for hollow-core slabs are TFE5 and TFE6 only, matched to the thin lower shell of the Spancrete slab without damaging the internal prestressing strands.

• A male anchor, not a sleeve: the TFE threads directly into the concrete and forms an internal mechanical thread. It is fully removable and reusable — unlike the female HC and HE-HC anchors, which stay permanently in the substrate.
• Advantage for work at height: installation is a single stroke — drill, clean and drive with an impact wrench, with no separate tool to expand a sleeve. Less effort and fatigue in prolonged scaffold work.
• Multi-point hanging systems: approved for redundant non-structural systems — infrastructure, fire-suppression piping, modular partitions and electrical / HVAC ducting.

TFE vs. HC vs. HE-HC for hollow-core slabs

Coatings — TF, TH and TX: what is the difference?

Choosing the right coating is an engineering decision no less important than the diameter and length. The series comes in three coatings for different environments.

• TF — cold galvanising: 5-micron electrolytic zinc (ISO 4042), for dry interiors; typically 96–200 hours in salt-spray testing per ISO 9227.
• TH — Atlantis C3-M: an advanced, multi-layer organic coating — not ordinary hot-dip galvanising and not simple cold galvanising. It gives 500+ guaranteed salt-spray hours (700+ typical per INDEX; 816 h to first red corrosion, Azterlan).
• TX — SS316 / A4 stainless: made from solid SS316 stainless throughout, for marine environments, swimming pools, hospitals, the food industry and aggressive chemical conditions.

Why buy the TF concrete screw through ADIT?

The ADIT TF is one of the market-leading concrete screws worldwide, manufactured in Europe by one of the largest anchoring-system manufacturers. ADIT has been active in Israel since 2006 — more than 18 years in anchoring — and provides real technical service: help choosing the model, diameter and length; CAD files, technical data and ETA certificates for immediate download; support for complex projects including engineering calculations; and on-site pull-out test support.

Frequently asked questions