--- title: "What Are Wedge Anchors (Through-Bolt) Used For?" description: "Wedge Anchors (Through-Bolt) (Trade series (torque-controlled expansion anchor)) are used for fixing steelwork, plant and services to concrete and masonry, w…" url: https://engineeringhardware.com/applications/wedge-anchors/ source: Engineering Hardware & Fasteners --- # What Are Wedge Anchors (Through-Bolt) Used For? Anchors & Concrete Fixings · Trade series (torque-controlled expansion anchor) · Application guide Typical applications, the industries that specify wedge anchors (through-bolt), and how to choose the right size, material and finish for the joint. Wedge Anchors (Through-Bolt) are used for fixing steelwork, plant and services to concrete and masonry, where the anchor is set in a drilled hole and its capacity is governed by the base material rather than by the steel. They are manufactured to Trade series (torque-controlled expansion anchor), and selection is driven by the thread size, the fit and tolerance the assembly requires, and the service environment. - **Primary duty:** Fixing steelwork, plant and services to concrete and masonry, where the anchor is set in a drilled hole and its capacity is governed by the base material rather than by the steel - **Governing standard:** Trade series (torque-controlled expansion anchor) - **Thread size range:** M8 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 Wedge Anchors (Through-Bolt) Used For? application image](https://engineeringhardware.com/wp-content/uploads/2026/08/Stud-Anchors.webp) Wedge Anchors (Through-Bolt) are used primarily for fixing steelwork, plant and services to concrete and masonry, where the anchor is set in a drilled hole and its capacity is governed by the base material rather than by the steel. This page lists the industries and assemblies where they are specified, the selection criteria that matter for each application, installation practice, and the cases where a different fastener type is the correct choice. Parts are supplied to Trade series (torque-controlled expansion anchor). Stocked across roughly M8 to M20, they cover general to heavy-duty work. ## Typical Applications for Wedge Anchors (Through-Bolt) The most common settings where these are specified: - **Structural fixing to concrete:** base plates, brackets, rails and steelwork bolted to a concrete slab or wall. - **Building services:** suspending cable tray, ductwork, sprinkler pipe and unistrut from a soffit. - **Plant & machine installation:** holding down machines, presses and conveyors on a factory floor. - **Fit-out & drylining:** fixing to plasterboard, block and hollow wall where there is no solid backing. - **General machine building:** fastening covers, brackets, motors and sub-assemblies on production equipment. Product catalog ## Related Wedge & Stud Anchors products [![Stainless Steel Expansion Bolt Construction Bolt Hollow Wall Bolt Wedge Anchor Bolt Fixing Bolt Lifting Anchor Bolt Sleeve Anchor](https://img.engineeringhardware.com/Stainless-Steel-Expansion-Bolt-Construction-Bolt-Hollow-Wall-Bolt-Wedge-Anchor-Bolt-Fixing-Bolt-Lifting-Anchor-Bolt-Sleeve-Anchor.webp)](https://engineeringhardware.com/product/stainless-steel-expansion-bolt-construction-bolt-hollow-wall-bolt-wedge-anchor-bolt-2/) Wedge & Through-Bolt Anchors ### [Stainless Steel Expansion Bolt Construction Bolt Hollow Wall Bolt Wedge Anchor Bolt Fixing Bolt Lifting Anchor Bolt Sleeve Anchor](https://engineeringhardware.com/product/stainless-steel-expansion-bolt-construction-bolt-hollow-wall-bolt-wedge-anchor-bolt-2/) DIN, ANSI, GB, JIS, BSW, GOST · Low Carbon Steel **Price on request**MOQ 1,000 pieces [![Carbon Steel Wedge Anchor Bolt Turning Machining Part Expansion Fastener Concrete Anchoring Construction Auto Spare Part](https://img.engineeringhardware.com/Carbon-Steel-Wedge-Anchor-Bolt-Turning-Machining-Part-Expansion-Fastener-Concrete-Anchoring-Construction-Auto-Spare-Part.webp)](https://engineeringhardware.com/product/carbon-steel-wedge-anchor-bolt-turning-machining-part-expansion-fastener-concrete/) Wedge & Through-Bolt Anchors ### [Carbon Steel Wedge Anchor Bolt Turning Machining Part Expansion Fastener Concrete Anchoring Construction Auto Spare Part](https://engineeringhardware.com/product/carbon-steel-wedge-anchor-bolt-turning-machining-part-expansion-fastener-concrete/) GB · Metal **US$0.17 – 0.79**MOQ 1,000 pieces [![High-Strength Steel Wedge Anchor, Grade 4.8, Blue-White Zinc Plated for Construction](https://img.engineeringhardware.com/High-Strength-Steel-Wedge-Anchor-Grade-4-8-Blue-White-Zinc-Plated-for-Construction.webp)](https://engineeringhardware.com/product/high-strength-steel-wedge-anchor-grade-4-8-blue-white-zinc-plated-for-construction/) Wedge & Through-Bolt Anchors ### [High-Strength Steel Wedge Anchor, Grade 4.8, Blue-White Zinc Plated for Construction](https://engineeringhardware.com/product/high-strength-steel-wedge-anchor-grade-4-8-blue-white-zinc-plated-for-construction/) Hexagon Head · DIN **US$0.012**MOQ 10,000 pieces [![Dxb170 Tor26 Hydraulic Breaker Through Bolt Forged Steel Heat Treated High Toughness Excavator Tool Parts](https://img.engineeringhardware.com/Dxb170-Tor26-Hydraulic-Breaker-Through-Bolt-Forged-Steel-Heat-Treated-High-Toughness-Excavator-Tool-Parts.webp)](https://engineeringhardware.com/product/dxb170-tor26-hydraulic-breaker-through-bolt-forged-steel-heat-treated-high-toughness/) Wedge & Through-Bolt Anchors ### [Dxb170 Tor26 Hydraulic Breaker Through Bolt Forged Steel Heat Treated High Toughness Excavator Tool Parts](https://engineeringhardware.com/product/dxb170-tor26-hydraulic-breaker-through-bolt-forged-steel-heat-treated-high-toughness/) Hydraulic Hammer Parts · Dxb/Tor Hydraulic Breaker **US$119.88 – 143.88**MOQ 10 pieces [![Sb81 Sb50 Sb100 New Condition Hydraulic Breaker Parts Through Bolt Side Bolt for Models](https://img.engineeringhardware.com/Sb81-Sb50-Sb100-New-Condition-Hydraulic-Breaker-Parts-Through-Bolt-Side-Bolt-for-Models.webp)](https://engineeringhardware.com/product/sb81-sb50-sb100-new-condition-hydraulic-breaker-parts-through-bolt-side-bolt-for/) Wedge & Through-Bolt Anchors ### [Sb81 Sb50 Sb100 New Condition Hydraulic Breaker Parts Through Bolt Side Bolt for Models](https://engineeringhardware.com/product/sb81-sb50-sb100-new-condition-hydraulic-breaker-parts-through-bolt-side-bolt-for/) Hydraulic Breaker Parts · 40cr, 42CrMo **US$27.60**MOQ 1 piece [![Yellow Zinc Plated Carbon Steel Concrete Wedge Anchor Bolts](https://img.engineeringhardware.com/Yellow-Zinc-Plated-Carbon-Steel-Concrete-Wedge-Anchor-Bolts.webp)](https://engineeringhardware.com/product/yellow-zinc-plated-carbon-steel-concrete-wedge-anchor-bolts/) Wedge & Through-Bolt Anchors ### [Yellow Zinc Plated Carbon Steel Concrete Wedge Anchor Bolts](https://engineeringhardware.com/product/yellow-zinc-plated-carbon-steel-concrete-wedge-anchor-bolts/) Round Head · DIN, ANSI, GB, JIS, BSW, GOST **US$0.0084 – 0.06**MOQ 1 piece [View all Wedge & Through-Bolt Anchors →](https://engineeringhardware.com/fastener-products/anchors-construction-fixings/wedge-through-bolt-anchors/) [Full product catalog](https://engineeringhardware.com/products/) ## How to Specify Wedge Anchors (Through-Bolt) for Your Application - **Size:** Match the nominal size to the mating thread or hole. This product spans M8–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 (torque-controlled expansion anchor). Quoting the standard on your order guarantees interchangeable dimensions between suppliers. ## Where Wedge Anchors (Through-Bolt) 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. Custom manufacturing · Made to drawing ## Need a wedge anchors (through-bolt) outside the standard range? Length and corrosion protection are the usual specials. The load a fixing will take is decided by the concrete and the edge distance, not by ordering a longer anchor. Made by hot forging or thread rolling. Minimum order from 2,000 pieces; samples within 7 days of drawing approval. [Custom anchor & concrete fixing manufacturing](https://engineeringhardware.com/custom/anchors/)[Send a drawing](https://engineeringhardware.com/custom/anchors/#rfq) ## Technical Drawing Dimensioned line drawing of M8 Wedge Anchors (Through-Bolt) to Trade series (torque-controlled expansion anchor). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected. - **Drill hole diameter (mm):** 8 - **Embedment depth (mm):** 40 - **Overall length (mm):** 75 - **Max fixture thickness (mm):** 15 - **Setting:** Torque-controlled - **Material:** Zinc plated steel - **Base material:** Cracked / uncracked concrete ## Dimensions & Specifications (Trade series (torque-controlled expansion anchor)) | Thread size | Drill hole diameter (mm) | Embedment depth (mm) | Overall length (mm) | Max fixture thickness (mm) | Setting | Material | Base material | | --- | --- | --- | --- | --- | --- | --- | --- | | M8 | 8 | 40 | 75 | 15 | Torque-controlled | Zinc plated steel | Cracked / uncracked concrete | | M10 | 10 | 50 | 95 | 20 | Torque-controlled | Zinc plated steel | Cracked / uncracked concrete | | M12 | 12 | 60 | 110 | 25 | Torque-controlled | Zinc plated steel | Cracked / uncracked concrete | | M16 | 16 | 75 | 145 | 30 | Torque-controlled | Zinc plated steel | Cracked / uncracked concrete | | M20 | 20 | 90 | 180 | 35 | Torque-controlled | Hot-dip galvanised | Cracked / uncracked concrete | 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](https://engineeringhardware.com/wp-content/uploads/2026/08/09-wire-rod-feed-cold-heading-machine.webp) 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](https://engineeringhardware.com/wp-content/uploads/2026/08/03-thread-rolling-machine-bolt-production.webp) 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](https://engineeringhardware.com/wp-content/uploads/2026/08/05-heat-treatment-baskets-black-bolts.webp) 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](https://engineeringhardware.com/wp-content/uploads/2026/08/23-zinc-plated-bolts-treatment-basket.webp) 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 ### What are Wedge Anchors (Through-Bolt) used for? Fixing steelwork, plant and services to concrete and masonry, where the anchor is set in a drilled hole and its capacity is governed by the base material rather than by the steel. They are supplied to Trade series (torque-controlled expansion anchor). ### Which industries use Wedge Anchors (Through-Bolt)? They are commonly specified in general machine building, maintenance & repair (mro) and fabrication & metalwork, among other sectors. ### How do I choose the right size of Wedge Anchors (Through-Bolt)? Match the nominal size to the mating thread or hole. This product is available from M8 to M20; the full dimension table on this page lists each size. ### What material should Wedge Anchors (Through-Bolt) 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. ### Can I get a quote for Wedge Anchors (Through-Bolt) 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. ## Related Pages Product page: [Wedge Anchors (Through-Bolt) — specifications & sizes](https://engineeringhardware.com/fastener/wedge-anchors/) ### Wedge Anchors (Through-Bolt) Specification Guides ### Related Fastener Applications