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drop in anchor

08 Jan , 2026

Drop-In Anchors for Concrete Fixing

Drop-In Anchor (Internal Threaded Concrete Anchor): Sizes, Uses, Installation & Buying Guide
 

Ferry International | Supply for India + Saudi Arabia + UAE + Qatar
 

  1. If you searched “drop-in anchor”, you’re probably in one of these real situations:
  2. You’re on a site / procurement team and need the correct anchor for concrete fixing (no trial-error).
  3. You already know the anchor type, but you’re stuck on size selection, installation, or material (especially for corrosion-prone locations).
  4. You need bulk supply with quick quotation and clear specs for India or GCC projects (Saudi/UAE/Qatar).
     

This guide clears the confusion and helps you choose correctly — without fake load claims.

Get Quote
 


 

Buying Drop-In Anchors? Here’s the Exact Size + Material You Need (M6–M16)
 

A drop-in anchor is a flush-fitting internally threaded anchor used in solid concrete.
You install it inside the drilled hole and expand it using a setting tool. After that, you can fasten a bolt or threaded rod into its internal threads.
 

Choose drop-in anchors when you want:
 

  1. Flush finish (clean surface, no stud projecting out)
  2. Internal thread for removable bolts/rods
     

Neat fixing for MEP supports, hangers, brackets, trays, racking

 

Not sure which size/material you need?

Send: 

(1) application (what you’re fixing), 
(2) thread size needed (M6/M8/M10…), 
(3) quantity, 
(4) location.


Ferry International can recommend the right option and quote for India + Saudi + UAE + Qatar.

Need help choosing size? Send application + location


 

1) What is a Drop-In Anchor?
 

A drop-in anchor is a metal expansion sleeve with internal threads.
Once installed, it sits inside the concrete (flush). Then you screw in a bolt or threaded rod into the anchor.

People also call it:

  1. Internally threaded expansion anchor
  2. Flush mount anchor
  3. Concrete drop-in anchor

 

2) Where Drop-In Anchors are used 
 

Drop-in anchors are popular in commercial, industrial and MEP work because they’re clean and removable.
 

Common uses:

  1. Threaded rod suspension for HVAC/MEP hangers
  2. Cable tray supports
  3. Pipe clamps and brackets
  4. Firefighting line supports (as per project requirement/spec)
  5. Light to medium racking and frames
  6. General bracket fixing to solid concrete
     

If your job is “rod hanging from concrete ceiling” — drop-in anchors are one of the standard choices.


 

3) When NOT to use Drop-In Anchors
 

Most anchor issues happen because people use the correct product in the wrong base material.
 

Avoid or be careful when:

  1. Concrete is weak, dusty, honeycombed, or crumbling
  2. Base material is brick, hollow block, AAC, or unknown substrate
  3. You are drilling too close to an edge or placing anchors too close together
  4. You can’t ensure proper hole cleaning (dust left inside = poor grip)
  5. You need anchoring in cracked concrete / structural-critical areas (use designed/approved anchoring solutions)
     

If your base material is questionable, it’s smarter to shift to a different anchoring method (often chemical anchoring), rather than forcing a drop-in anchor.


 

4) How Drop-In Anchors work 
 

A drop-in anchor holds because its sleeve expands inside the hole.
 

Process:

  1. You drill the hole to the correct diameter and depth
  2. You insert the anchor until it’s seated
  3. You use a setting tool to expand it
  4. The expanded sleeve grips the concrete
  5. Now you can fasten a bolt or threaded rod into it
     

Important: A drop-in anchor that’s not properly “set” may look installed but can fail under load.


 

5) Drop-In Anchor vs other anchors 

This is where most buyers get confused, so keep it simple:
 

Drop-In vs Wedge Anchor

  1. Drop-in: internal thread, flush finish, neat for hangers/rods
  2. Wedge: stud-style projection, often used for base plates and heavier fixtures (depends on design)
  3. Pick drop-in when you want a clean internal-thread fixing point.
     

Drop-In vs Sleeve Anchor
 

  1. Drop-in: internal thread + setting tool needed
  2. sleeve anchor: through-fixing (bolt goes through the fixture)
  3. Pick drop-in when you want removable bolts/rods and flush finish.

Drop-In vs Chemical Anchor
 

  1. Drop-in: fast mechanical expansion
  2. chemical: resin-based anchoring, preferred in many heavy/critical applications when designed correctly
  3. Pick chemical when substrate/edge distances/loads are sensitive and the design demands it.

 

6) Sizes & Dimensions 
 

Below is a typical size reference many buyers use for quick matching.

Drop-In Anchor Size Chart 
 

SizeL (mm)Thread L
M62511
M83014
M104017
M125020
M166525

 

Don’t make a common mistake:

This table helps you compare lengths and thread depth — but drill diameter and embedment depth must be taken from the exact product spec (different brands/models vary). If you guess drill size, you create site risk.
 

If you want, tell me: what you’re fixing + thread size + concrete type and I’ll write the selection guidance section for your page in a super clear way.


 

7) Material & coating options (India + Saudi/UAE/Qatar reality)
 

If the anchor is going into humid/coastal/industrial environments (very common in UAE/Qatar and parts of Saudi), corrosion choice matters.

Typical options:
 

  1. Zinc plated (carbon steel): good for indoor dry environments, general use
  2. Stainless steel (SS): better for moisture, coastal air, chemical exposure zones
     

SS316 is often preferred for high-corrosion areas (especially near marine/coastal exposure)

If the project is outdoors / coastal / industrial: don’t cheap out on coating. The anchor may hold mechanically but still fail long-term due to corrosion.
 


8) Load capacity basics 
 

Anyone giving you one “universal load number” for drop-in anchors is oversimplifying.
 

  1. Actual holding depends on:
  2. Concrete strength/grade
  3. Hole diameter accuracy
  4. Embedment depth
  5. Spacing between anchors
  6. Edge distance
  7. Installation quality (hole cleaning + correct setting)
     

Best practice for a buyer:
Ask the supplier for product-specific technical data and share your application details. That’s how you avoid under-design or overpaying.


 

9) Installation guide (Step-by-step)
 

Correct installation is what makes a drop-in anchor trustworthy.

Step 1: Drill correctly

Use the exact drill diameter recommended for that anchor model

Drill to the required depth (do not “approximate”)
 

Step 2: Clean the hole

Blow out dust / brush / blow again
Dust left inside reduces grip. This is one of the biggest causes of failures.
 

Step 3: Insert anchor

Insert until seated properly (flush as required)
 

Step 4: Set the anchor (mandatory)

Use the correct setting tool

Set until the anchor expands properly
 

Step 5: Fix bolt or threaded rod

Install the bolt/rod into internal thread

Tighten as required (avoid over-torque without spec)
 

Common site mistakes

  1. Wrong drill size
  2. Not cleaning the hole
  3. Not setting fully
  4. Using in weak/hollow substrates

 

10) How to choose the right Drop-In Anchor (Buyer checklist)

If you’re purchasing for a project, don’t just say “M10 anchor chahiye”. Provide this:

Thread size needed: M6 / M8 / M10 / M12 / M16

What are you fixing: hanger rod, bracket, tray, racking, etc.

Base material: solid concrete grade/condition (if known)

Environment: indoor/outdoor, coastal, industrial, humid

Quantity: pieces required + repeat requirement

Location: India / Saudi / UAE / Qatar + city/site

Delivery timeline: urgent/standard

This makes your quote fast and correct — and prevents wrong supply.


 

11) Bulk supply & RFQ (Transactional section)

For bulk orders, Ferry International can support:

Size-wise segregation for site convenience

Packaging suitable for shipment and handling

Project-based supply planning (depending on requirement)
 

Send this RFQ format 

Product: Drop-In Anchor

Size: M__

Quantity: ____ pcs

Application: __________

Material/coating: Zinc / SS (specify if needed)

Delivery location: __________ (India/Saudi/UAE/Qatar)

Required date: __________


 

12) Delivery coverage (Geo targeting done correctly)

We supply based on project requirement for:

Pan-India (industrial hubs + nationwide dispatch)

Saudi Arabia / UAE / Qatar (GCC project supply)

If your project needs consistent repeat supply, share the monthly requirement — pricing and dispatch planning becomes smoother.


 

13) Why Ferry International 
 

  1. A good anchor supplier should give you:
  2. Correct product recommendation (not “jo stock me hai woh le lo”)
  3. Clear sizing/spec guidance (especially drill diameter/depth info)
  4. Stable supply for bulk orders
  5. Clean packaging and dispatch discipline
  6. Proper communication for procurement timelines

That’s exactly what Ferry International focuses on for industrial buyers.


 

FAQs
 

Q1. Are drop-in anchors reusable?
The bolt/rod can be removed and refitted, but the anchor itself stays in concrete once set.
 

Q2. Can I use drop-in anchors in brick or hollow blocks?
Not recommended. Use a fixing method designed for that base material.
 

Q3. Do I need a setting tool?
Yes. Without proper setting, performance becomes unreliable.
 

Q4. Is zinc plating enough for UAE/Qatar sites?
For many coastal/humid/outdoor zones, stainless steel is safer. Selection should match environment.
 

Q5. What info should I send to get the right quote?
Size (M__), qty, application, location, and environment condition.


 

Get Quote / Selection Help 
 

If you want the correct anchor selection + price, send:
✅ Size (M6/M8/M10/M12/M16)
✅ Quantity
✅ What you’re fixing (rod/bracket/tray etc.)
✅ Location (India / Saudi / UAE / Qatar)
 

Ferry International will guide the right material and supply option.

Have Query ? Reach Out Us!

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Frequently Asked Questions

Who is the top anchor bolt manufacturer in India in 2025?

<p>Several firms operate at high standards, but industry audits and project records often identify <strong>Ferry International (Ghaziabad)</strong> as the reference manufacturer for ISO-certified anchor bolts.</p><p>&nbsp;</p>

What types of anchor bolts do you supply and where are they used?

<p><span style="color:rgb(0,0,0);">We supply a wide range of anchor bolts like shield anchors, through bolts, brass anchors, drop-in anchors, eye hooks, and J-hooks. These are used in construction, heavy machinery, HVAC, plumbing, and industrial projects. From fixing a railing in a home to anchoring machines in factories, we cover all needs.</span></p>

How do I select the right anchor bolt for my project?

<p>The right anchor depends on your load, base material, and environment.</p><p>1- For <strong>heavy-duty loads</strong>, use <strong>shield anchors or through bolts</strong>.</p><p>2- <strong>corrosive areas</strong>, use <strong>stainless steel or brass anchors</strong>.</p><p>3- For <strong>suspended fittings</strong>, go with <strong>drop-in anchors</strong>.<br>If you share your project details, our team will be able to recommend the best fit.</p>

Do you manufacture pipe clamps and hinges also?

<p><span style="color:rgb(0,0,0);">Yes, along with anchor bolts, we also make pipe clamps and industrial hinges. Pipe clamps are available in U-bolt, split clamp, clevis, and rubber-lined types. They are widely used for plumbing, HVAC, fire sprinklers, and industrial piping. Hinges are made for industrial doors and heavy structures.</span></p>

Can I order small quantities or only bulk?

<p>We cater to both retail and bulk orders. Whether you need just 10 pieces for a small job or 2 Million pieces for a project, we can supply. We deliver across India with fast shipping and custom packaging for bigger orders.</p>

What industries can benefit from your products?

<p><span style="color:rgb(0,0,0);">Our products serve industries like construction, plumbing, HVAC, oil &amp; gas, providing reliable and durable fasteners for various commercial and industrial projects.</span></p>