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Have Query ? Reach Out Us!
30 Jul , 2026
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 Through Bolts, Shield Anchors (3-leaf & 4-leaf), Eye Hook Anchors, Drop-in Anchors, J-Hook Anchors, and Brass Anchors in-house
| 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 |
|---|---|---|
| Through Bolt (Wedge Anchor Type) | Concrete base plates, machinery mounting, structural steel | 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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Ferry International — bulk anchor bolt manufacturer from Ghaziabad, U.P., since 1957. We produce ASTM & IS-compliant Shield Anchors, Through Bolts, Drop-in Anchors, J-Hook Anchors, Eye Hook Anchors, Brass Anchors, and pipe clamps for construction, oil & gas, power, marine, solar, and infrastructure. Bulk RFQs only. ISO 9001:2015 | ZED Bronze | UDYAM Registered.
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