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Have Query ? Reach Out Us!
26 Oct , 2025
Hot Dip Galvanized Anchor Bolts – Built for Strength & Lasting Protectio
Hot Dip Galvanized Anchor Bolts are steel foundation bolts coated with a protective layer of zinc through immersion in molten zinc at around 450 °C. This bonded zinc coating prevents rust, improves bond with concrete, and ensures a lifespan of 25 years or more in outdoor or marine conditions.
At Ferry International, we manufacture and galvanize J-, L-, U-, and Straight-type anchor bolts in-house — along with Through Bolts, Shield Anchors, Eye Hook Anchors, Drop-ins, and Brass Anchors — delivering custom sizes, factory-tested strength, and on-time dispatch.
| Process Step | What Happens | Result |
|---|---|---|
| Degreasing & Pickling | Surface cleaning of steel bolts | Removes oil & scale |
| Flux Bath | Prepares the surface for zinc bonding | Ensures smooth coating |
| Hot Dip in Molten Zinc (450 °C) | Zinc bonds metallurgically to steel | Corrosion-proof layer formed |
| Cooling & Inspection | Thickness checked (80–110 µm) | Uniform, adherent finish |
If your project is fully indoor, a zinc-plated finish may work.
But for any structure that faces weather, HDG is the lifetime solution.
| Product Type | Typical Use | Available Finish |
|---|---|---|
| J- & L-Type Anchor Bolts | RCC Foundations, Machinery Base Plates | Hot Dip Galvanized / Zinc |
| Through Bolts | Steel Columns & Beams | HDG / Zinc |
| Three & Four Leaf Shield Anchors | Brick / Solid Concrete Fixings | Zinc / HDG |
| Drop-in Anchors | Ceiling Supports & MEP Systems | Zinc |
| Eye Hook Anchors | Suspended Loads / Cables | HDG / Zinc |
| Brass Anchors | Electrical / Plumbing Fixtures | Brass Finish |
| Parameter | Typical Range | Standard |
|---|---|---|
| Diameter Range | M10 – M56 (custom up to M64) | IS 5624 / ASTM F1554 |
| Coating Thickness | 80–110 µm | IS 4759 / ASTM A153 |
| Grades | 4.6 / 5.6 / 8.8 / 10.9 / SS 304 / 316 | – |
| Thread Type | Metric / UNC / UNF | ISO / ANSI |
| Testing | Torque / Pull-Out / Salt Spray | ISO 9001 Lab Tested |
Every batch undergoes a coating thickness check, a torque test, and a visual inspection before dispatch.
Could you email your drawing or send it on WhatsApp? We'll be sure to reply within 24 hours with a technical quotation and lead time.
| Inspection | Method | Result |
|---|---|---|
| Thread Gauge Check | ISO Metric / UNC | Perfect Fit |
| Coating Thickness | Micron Meter | Uniform HDG Finish |
| Pull-Out Test | Torque Machine | Verified Load Capacity |
| Salt Spray Test | 48 – 72 Hours | Corrosion Resistance Proof |
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Q1: How long do HDG Anchor Bolts last outdoors?
A: Typically 25–50 years, depending on environment and coating thickness.
Q2: Do you supply matching nuts and washers?
A: Yes, we supply complete sets with plate washers for leveling foundations.
Q3: Can you manufacture as per my drawing?
A: Absolutely — send your PDF/DWG and we will confirm dimensions before production.
Q4: What standards do you follow for coating?
A: IS 4759 for HDG coating, ASTM A153 for international projects.
Share your drawing today and get a technical quote within 24 hours. Our team helps you finalize the grade, coating, and delivery plan for your project.
📧 contact@ferry-international.com
📞 +91-9990877399
📍 Plot No. E-2, Sector B-1, Trans Delhi Signature City, Ghaziabad 201103, India
Have Query ? Reach Out Us!
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Since the inception, Ferry International is offering the huge range of the anchors, screws, nut and bolts, clamps, and pipes, wire mesh, etc. With the experience of more than six decades in the field of manufacturing industrial fasteners to the meet the demand of every industry, we are world class Nut Bolt manufacturers, suppliers, and exporters.
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