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brass expansion anchors

10 Nov , 2026

Brass Expansion Anchors M6–M12: Size Chart & Bulk Guide

Brass Expansion Anchors for Electrical & MEP Projects: M6–M12 Size Chart & Bulk Buying Guide
 

Brass expansion anchors are internally threaded mechanical fasteners used to attach suitable fixtures, brackets and accessories to approved solid base materials. Their compact design, metric threads and corrosion-resistant brass construction make them an option for various electrical, mechanical and building-services applications.

For bulk buyers, selecting the correct brass anchor involves more than choosing between M6, M8, M10 and M12. The base material, fixture load, installation method, hole dimensions and project specifications must also be considered.

At Ferry International, we manufacture brass anchors for industrial and construction requirements in India. Our published product range includes M6, M8, M10 and M12 brass anchors.

This guide explains the available dimensions, typical applications, important installation considerations and the information procurement teams should provide when requesting a bulk quotation.

Need brass expansion anchors in bulk?

View Ferry International Brass Anchors or submit your project requirement.
 

What Is a Brass Expansion Anchor?

A brass expansion anchor is a metal fastening insert with an internal thread and an expansion mechanism.

It is installed into a correctly prepared hole in a compatible base material. When the appropriate screw or bolt is fitted and tightened according to the manufacturer's installation instructions, the anchor expands against the surrounding material.

The resulting mechanical connection can be used for an approved fixture or support arrangement.

Brass expansion anchors are commonly considered for:
 

  • Electrical accessory mounting
  • Small equipment brackets
  • Mechanical-service fixtures
  • Pipe-support accessories
  • Building maintenance installations
  • Selected solid-masonry fixings
  • Other approved threaded fixing applications
  • The exact application must be compatible with the anchor design, base material and required loads.
     

Why Are Brass Anchors Used in Electrical and MEP Installations?

Electrical and MEP contractors frequently need threaded fixing points for equipment accessories and building-service components.

Brass anchors offer several practical characteristics.

1. Internally Threaded Connection

The internal metric thread allows a compatible bolt or screw to connect the fixture to the anchor.

This arrangement can be useful where a compact threaded fixing point is specified.

2. Corrosion-Resistant Material

Brass offers corrosion resistance in many service conditions.

However, suitability for coastal, chemically aggressive or continuously wet environments depends on the brass alloy, exposure conditions and complete fixing assembly.

3. Compact Installation

Brass expansion anchors are available in relatively compact sizes.

They may be considered for installation locations where the approved design calls for a small mechanical expansion anchor.

4. Multiple Metric Sizes

With M6, M8, M10 and M12 options, procurement teams can identify different thread sizes for project requirements.

Important: A larger thread size does not automatically establish that an anchor is suitable for a particular load. Approved performance data and the base material must be checked.
 

Brass Expansion Anchor Size Chart: M6, M8, M10 and M12

Ferry International publishes the following dimensions for its brass anchors.

 

Thread sizeDimension DDimension HDimension L
M68 mm24 mm22 mm
M810 mm30 mm28 mm
M1012 mm35 mm33 mm
M1215 mm40 mm38 mm

 

Source: Ferry International Brass Anchors product listing. Measurements are subject to applicable tolerances.

The table reproduces the manufacturer's published dimensional labels.
 

Do not treat Dimension D as an approved drill-hole diameter without checking the product drawing or installation instructions.
 

The letter M indicates the nominal metric thread size.

For example:
 

  1. M6 identifies a nominal 6 mm metric thread.
  2. M8 identifies a nominal 8 mm metric thread.
  3. M10 identifies a nominal 10 mm metric thread.
  4. M12 identifies a nominal 12 mm metric thread.
     

The actual anchor-body dimensions are different from the thread diameter.

For the latest product information, visit our Brass Anchors product page.
 

Where Are Brass Expansion Anchors Used?

Electrical Equipment and Accessory Fixing

  1. Electrical contractors may use approved brass anchors for attaching suitable accessory brackets, equipment supports and small fixtures to compatible solid substrates.
  2. The fixing selection must take account of the equipment weight, vibration, base material and applicable electrical installation requirements.
  3. A brass anchor should not be assumed to provide an approved electrical grounding connection simply because brass is electrically conductive.
     

Mechanical and MEP Installations
 

  1. MEP projects often involve mounting brackets, accessories and service components.
  2. Where the project calls for a compact threaded anchor, brass expansion anchors may be considered after verifying their suitability.
  3. For heavy suspended services or critical fixings, an engineer must confirm the correct anchor system and its rated performance.
     

Commercial Building Maintenance
 

  1. Facilities teams may require matching threaded anchors for replacement fixtures and approved maintenance installations.
  2. Checking the existing substrate and original fixing specification is important before selecting a replacement.
     

Construction and Interior Installations
 

  1. Brass anchors may be used in compatible solid masonry or concrete for approved non-structural fixing applications.
  2. The use of an expansion anchor in hollow blocks, weak masonry, cracked concrete or near free edges requires specific evaluation.
  3. Do not assume an anchor suitable for solid brick will perform the same way in hollow blockwork.
     

Brass Expansion Anchors for Concrete and Masonry: What Must Be Checked?

The base material is one of the most important parts of anchor selection.

 

Solid Concrete

  1. Mechanical expansion anchors can be used in concrete where the specific product is suitable for the concrete condition and loading.
  2. The engineer or installer must check whether the fixing is approved for the actual concrete, including any cracked-concrete requirement.
     

Solid Brick or Masonry
 

  1. Some brass expansion-anchor designs can be used in suitable solid masonry.
  2. However, the masonry strength, hole condition and edge distance affect performance.
     

Hollow Blocks and Lightweight Materials
 

  1. A conventional brass expansion anchor should not be treated as a universal fixing solution for hollow or lightweight materials.
  2. Such installations may require a different approved fastening system.
     

Overhead and Suspended Fixings
 

  1. Overhead installation requires particular care because anchor failure can cause falling components.
  2. Use only an anchor system with documented suitability and appropriate design verification for the intended overhead load.
  3. For high-load or specialist applications, consider our Drop-in Anchors or Three Leaf Shield Anchors, subject to their own technical specifications and suitability.
     

How Do You Select the Correct Brass Anchor Size?

Selection should start with the fixture and installation requirements, not with the assumption that a particular M-size is sufficient.

Step 1: Identify the Application

Confirm whether the fixing is intended for an electrical accessory, equipment bracket, mechanical-service component or another application.

Step 2: Confirm the Base Material

Identify the actual substrate:

  • Concrete
  • Solid brick
  • Natural stone
  • Other masonry material

The anchor must be appropriate for the specific substrate condition.

Step 3: Determine the Required Loads

Review the expected tensile, shear and combined loads, including any applicable dynamic or vibration effects.

The required capacity must be checked against valid manufacturer technical data and project design requirements.

Step 4: Select the Thread Size

Choose the required metric thread based on the approved fixture and anchor specification.

Do not interchange M6, M8, M10 and M12 simply because the anchors appear similar.

Step 5: Verify Installation Details

Obtain the correct drill diameter, hole depth, embedment, edge-distance and tightening requirements for the selected product.

Step 6: Finalise the Purchase Quantity

Prepare a size-wise requirement with quantities, required documentation and delivery location.

This helps the supplier review the procurement requirement accurately.
 

How Are Brass Expansion Anchors Installed?

Installation procedures depend on the specific anchor design.

The general process involves:

  • Confirming the correct substrate and approved fixing position.
  • Drilling the hole to the verified manufacturer dimensions.
  • Preparing and cleaning the drilled hole as instructed.
  • Inserting the brass expansion anchor correctly.
  • Fitting the appropriate threaded bolt or screw.

Tightening according to the manufacturer's instructions.

Inspecting the finished fixing.

Never use an assumed universal drilling size, tightening torque or embedment depth for all brass anchors.

Insufficient expansion, unsuitable substrate conditions and installation damage can compromise fixing performance.

For safety-critical installations, follow the project engineer's approved fastening design and inspection requirements.
 

Brass Expansion Anchor vs Steel Drop-in Anchor

Both products provide internally threaded fixing arrangements, but they are not automatically interchangeable.
 

FeatureBrass expansion anchorSteel drop-in anchor
MaterialBrassSteel
ConnectionInternal metric threadInternal metric thread
ExpansionProduct-specific expansion mechanismProduct-specific setting mechanism
Common considerationsCompact threaded fixing, corrosion exposureConcrete fixing and approved suspended-service applications
Installation checkCorrect bolt engagement and expansion methodCorrect setting tool and embedment
Selection basisBase material and verified anchor performanceBase material and verified anchor performance

 

The correct product depends on the installation design and performance requirements.

View Ferry International's Drop-in Anchor product range for alternative fixing requirements.

For a broader overview, read our Anchor Bolt Sizes Explained.
 

How to Prepare a Brass Anchor Bulk Order BOQ
 

Electrical contractors, industrial buyers and project procurement teams should prepare their requirements by size and installation specification.

An enquiry with complete information can be reviewed more accurately than a request asking only for the price of "brass anchors."
 

Bulk Brass Anchor Procurement Checklist
 

RequirementInformation to provide
ProductBrass Expansion Anchor
Thread sizeM6, M8, M10 or M12
Anchor dimensionsApproved drawing or specified size
Base materialConcrete, solid brick or other
Fixture applicationElectrical, MEP, bracket or other
Load requirementEngineer-approved load or specification
QuantityNumber of pieces for each size
Required documentationAs specified by the buyer
PackagingAny project-specific requirement
Delivery locationCity, state and PIN code
DrawingsApproved product or installation drawing, where available

 

For larger procurement packages containing multiple anchor types, each product should be listed separately.

Explore the Ferry International Fixing Anchors range when preparing a mixed fastener requirement.

Have an M6–M12 brass anchor requirement?

Send Your Bulk RFQ to Ferry International.
 

What Affects Brass Expansion Anchor Prices in India?

  • Bulk brass-anchor quotations may vary according to the actual product and purchasing requirements.
  • Important commercial factors can include:
  • Brass material specification
  • Thread size
  • Anchor-body dimensions
  • Quantity per size
  • Manufacturing tolerances
  • Packaging requirements
  • Applicable testing or documentation requirements
  • Delivery location
  • Agreed commercial terms
  • A bulk quotation should identify the same specifications across competing offers.
  • If two suppliers quote different anchor dimensions or material specifications, the per-piece prices may not represent equivalent products.
  • For project procurement, request a written quotation against a clear size-wise BOQ.
     

Buying Brass Anchors for Projects in Maharashtra and Across India

Industrial procurement requirements may come from electrical contractors, mechanical-service installers, construction companies and industrial maintenance departments.

For buyers working on projects in Mumbai, Pune, Nashik, Nagpur or other parts of Maharashtra, the correct sourcing process begins with a clear technical requirement.

Ferry International manufactures brass anchors from Ghaziabad, Uttar Pradesh, and accepts industrial product enquiries from buyers in India.
 

  • When contacting our team, share:
  • Project city and delivery PIN code
  • Required M6–M12 sizes
  • Quantities per size
  • Base material and intended application
  • Approved product dimensions
  • Technical drawing or procurement specification, where available
  • Our team can review the enquiry and discuss the applicable product and commercial requirements.
     

Why Choose Ferry International for Bulk Brass Anchor Enquiries?

At Ferry International, we manufacture industrial fastening products for construction and industrial applications.

Our fixing-anchor range includes:

  1. Brass Anchors
  2. Three Leaf Shield Anchors
  3. Drop-in Anchors

Our manufacturing operations are based in Tronica City, Ghaziabad.

For bulk procurement, we encourage customers to provide verified product specifications, quantities and project details so the appropriate enquiry can be reviewed.
 

Frequently Asked Questions About Brass Expansion Anchors
 

1. What is a brass expansion anchor?

A brass expansion anchor is an internally threaded mechanical fastening insert that expands within a compatible drilled hole when installed according to its design. It provides a threaded fixing point for suitable fixtures.

2. What brass anchor sizes are available from Ferry International?

Ferry International's product page lists M6, M8, M10 and M12 brass anchors with published D, H and L dimensions.

3. What is the difference between an M6 and M8 brass anchor?

M6 and M8 refer to different nominal metric thread sizes. The products also have different listed body dimensions. Final selection depends on the application and approved technical data.

4. Can brass anchors be used in concrete?

Brass expansion anchors may be suitable for specified concrete applications, but the particular anchor must be compatible with the concrete condition, fixture load and installation design.

5. Can brass anchors be used to suspend electrical or MEP equipment?

Only where the specific anchor system is approved and properly designed for the intended load and installation conditions. Do not assume general brass anchors are suitable for critical overhead suspension.

6. Are brass expansion anchors corrosion-resistant?

Brass is corrosion-resistant in many environments, but its suitability depends on the alloy, exposure conditions and other parts of the fixing assembly.

7. What drill size should I use for an M8 brass anchor?

Use the drill-hole specification provided for the exact anchor product. The internal thread size alone does not determine the required drilling diameter.

8. Where can I enquire about M6–M12 brass anchors in bulk in India?

Ferry International is a brass anchor manufacturer based in Ghaziabad, India. Buyers can submit a bulk enquiry with size-wise quantities, dimensions and project requirements.
 

Request a Bulk Brass Expansion Anchor Quotation

Looking for M6, M8, M10 or M12 brass anchors for an electrical, MEP, construction or industrial project?

Send your size-wise BOQ, quantity and technical requirements to Ferry International.

We can review your product enquiry and discuss the relevant specifications and commercial terms.

Request a Bulk Brass Anchor Quote

Contact Ferry International

Phone: +91 11 41410882
Email: contact@ferry-international.com
Manufacturing location: Tronica City, Ghaziabad, Uttar Pradesh, India

Ferry International — Brass Anchors and Industrial Fastening Solutions for Bulk B2B Buyers.

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