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Brand: Hilti
Hilti HST4 High-Performance Wedge Anchor M8-M20
Description
The Hilti HST4 is Hilti’s highest-performing wedge expansion anchor, a torque-controlled anchor for bearing high static and seismic loads in cracked concrete. It is made in carbon steel with zinc plating (the HST4-R is the stainless version) and is sized M8 to M20 with two embedment options per size.
A newer-generation wedge anchor for baseplates, handrails and building services
The Hilti product page lists fastening of baseplates, handrails, facade systems and mechanical, electrical or plumbing supports to concrete, in cracked and uncracked concrete where building-code compliance is required. It is assessed for static, quasi-static, seismic (C1 and C2), fire and fatigue loading and is suitable for dry indoor use. Hilti points to improved concrete capacity and pull-out loads that allow smaller baseplates, shallow and deep embedment options, installation with adaptive-torque tools without borehole cleaning, and a patented anti-spin expansion cone.
Technical specifications
| Parameter | Specification |
|---|---|
| Anchor type | Torque-controlled wedge anchor for concrete |
| Product page material | Carbon steel, zinc-plated, externally threaded head (HST4); HST4-R in stainless steel |
| Sizes | M8, M10, M12, M16, M20; dome-nut HST4 DN M10 and M12; HST4 BW M8 to M16 |
| Approvals listed | ETA-21/0878 (CSTB, static, seismic, fire); ETA-25/1251 (fatigue); BZS D 24-602 (shock); UES ER-815 (IAPMO UES); Hilti certificate of compliance listed |
| Seismic | Categories C1 and C2 per product page; ACI design data in the datasheet |
| Drill bit diameter | 8, 10, 12, 16, 20 mm |
| Installation torque | 20, 40, 60, 120, 180 Nm for M8 to M20 |
| Maximum clearance hole in fixture | 9, 12, 14, 18, 22 mm |
| Effective embedment hef | 30 or 45 mm (M8); 30 or 60 (M10); 40 or 70 (M12); 65 or 85 (M16); 101 mm (M20) |
| Nominal embedment hnom | 36 or 51 (M8); 38 or 68 (M10); 49 or 79 (M12); 77 or 97 (M16); 116 mm (M20) |
| Minimum concrete thickness, cleaned hole | 80 or 84 (M8); 80 or 102 (M10); 100 or 120 (M12); 120 or 140 (M16); 160 mm (M20) |
| Steel in tension Nsa, HST4 | 22.2, 32.5, 46.0, 75.0, 124.2 kN for M8 to M20 |
| Installation tools named on product page | TE 30-22 and TE 6-22 cordless rotary hammers; SIW 4AT-22 and SIW 6AT-22 impact wrenches |
| Filling washer | Diameter 38, 42, 44, 52, 60 mm for M8 to M20 |
Choosing between HST3 and HST4
| Anchor | Notes from the datasheets |
|---|---|
| HST3 | Sizes M8 to M24; ETA-98/0001; datasheet Nov-23, European design |
| HST4 | Sizes M8 to M20; ETA-21/0878; datasheet Jun-25 uses ACI 318 chapter 17 design and the UES ER-815 report |
The HST4 datasheet is written for design to ACI 318 using evaluation report ER-815, and for diamond-drilled holes and hollow drill bits it relies on Hilti technical data taken from ETA testing. For European-code design, use the ETA and PROFIS Engineering. The datasheet also notes that HST4 M16 carbon steel anchors have reduced capacity in diamond-drilled holes compared with hammer drilling.
Selection and ordering checks
Confirm the size, anchor length (the Hilti page lists lengths from 50 to 260 mm and pack sizes from 5 to 100 pieces), the embedment option, the concrete thickness, the loading case, the corrosion environment and whether the project specifies ETA or ACI design. Ask for the stainless HST4-R where corrosion resistance is needed, and check that the approval validity date on the UES report is acceptable to the specifier.
Documents and quotation
For a quotation on the HST4, send Seven Star LLC the exact model, quantity and delivery point in Oman or elsewhere in the GCC. Seven Star LLC is an independent supplier based in Muscat and does not hold any manufacturer status for Hilti. The Hilti HST4 (-R) technical datasheet (steel-to-concrete, ACI design, update Jun-25) is attached as a manufacturer PDF; ETAs and other approvals are listed on the Hilti product page. Current item numbers, pack sizes and availability should be read from the Hilti product page. Related Hilti items sit in the Material Handling & Lifting Equipment category.
Datasheets & Documents
- Datasheet Hilti HST4 (-R) expansion anchor technical datasheet, steel-to-concrete, ACI design (manufacturer PDF, Jun-25) Download
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About brand
Hilti is the Liechtenstein construction technology company for fastening, anchoring, firestop, installation and power tool systems. The brothers Martin and Eugen Hilti opened a small mechanical workshop in Schaan, Liechtenstein, in 1941, and the company turned to fastening technology after Martin Hilti acquired a fastening patent in 1948. Hilti is still headquartered in Schaan and controlled by the Martin Hilti Family Trust, created in 1980.
Seven Star LLC is an independent supplier in Muscat. We list Hilti power tools and firestop products, each with the manufacturer operating instructions, for contractors and maintenance teams in Oman and the GCC.
Hilti company profile
| Founded | 1941, Schaan, Liechtenstein |
|---|---|
| Founders | Martin Hilti and Eugen Hilti |
| Headquarters | Schaan, Liechtenstein |
| Ownership | Controlled by the Martin Hilti Family Trust (created 1980) |
| Product families | DX powder-actuated and BX battery fastening tools, stud fusion systems, mechanical and chemical anchors, CP and CFS firestop sealants and systems, MQ and MI installation channels, cordless power tools and measuring tools |
Milestones
- 1941: Martin and Eugen Hilti open a mechanical workshop in Schaan.
- 1948: Martin Hilti acquires a patent for fastening technology.
- 1952: The first international sales cooperation is agreed, in Italy.
- 1957: The DX 100 powder-actuated tool is introduced, which Hilti describes as the world's first.
- 1980: The Hilti family creates the Martin Hilti Family Trust.
Hilti product series
The power tools listed here include SDS Plus and SDS Max rotary and combihammers (TE 8-22, TE 70-22, TE 70-ATC/AVR), demolition hammers and breakers (TE 1000-AVR, TE 2000-22, TE 3000-AVR), angle grinders from 125 to 230 mm (AG 125-13S, AG 230-24D, AG 4D-22, AG 30D-22), cordless impact wrenches (SIW 6AT-22, SIW 10-22, SIW 20-22), the SF 30M-22 magnetic drill press, the SF 6H-22 hammer drill driver and the SC 6ML-22 metal-cutting circular saw. Many of the cordless models run on the 22 V Nuron battery platform.
Firestop products such as the CP 601S silicone sealant and CP 606 acrylic sealant seal penetrations and joints in fire-rated walls and floors.
Where Hilti tools are used
Drilling and anchoring in concrete, demolition and chiselling, steel fabrication and erection, bolting on structures and pipe supports, mechanical and electrical installation work and passive fire protection in buildings and industrial plants.
Hilti products we list
Ordering Hilti products: what we need
Give the tool designation and, if available, the item number. For cordless tools state whether you need the bare tool or a kit with batteries and charger; for corded tools give the supply voltage and plug type. For firestop products give the product, colour, cartridge size and quantity, and the fire rating or approval the project requires.
Facts checked against Hilti's published company history, October 2026.
Browse Hilti products by category: Material Handling & Lifting Equipment.
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Frequently Asked Questions
What is the HST4?
A torque-controlled wedge expansion anchor from Hilti for high static and seismic loads in cracked concrete, sized M8 to M20.
Which loads is it assessed for?
Static, quasi-static, seismic C1 and C2, fire and fatigue loading per the Hilti product page.
Does it need hole cleaning?
The datasheet lists installation including with no cleaning, using adaptive-torque compatible tools.
What is the HST4-R?
The stainless steel version of the HST4 in the same size range.
Which design code does the datasheet use?
The datasheet is written for design to ACI 318 chapter 17 based on UES ER-815; the ETA is used for European design.
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