05 Aug, 2026 Let me start with a story. A few years ago, a friend of mine built his dream home near Alibaug. Beautiful place. Sea-facing. Teak wood doors everywhere. He spent a fortune on the wood, the handles, the locks. Six months later, he called me frustrated. The doors were sagging. The hinges had rust spots. They squeaked every time someone walked in.
I went to see the place. One look at the hinges told me the problem. Cheap mild steel with a chrome coating. The salty sea air had eaten through the coating. Rust was spreading under the paint. The pins were wearing out. The doors were slowly dying.
If he had spent a little more on SS 304 stainless steel butt hinges, he would never have had that problem. The doors would still be perfect today.
This is the reality. Hinges are small, but they carry the weight of your doors. If you choose the wrong ones, you pay for it again and again. If you choose the right ones, you forget they exist. At Crown ISI , we make SS Butt Hinges that actually last in Indian conditions. Hot summers, wet monsoons, salty coastal air—our hardware handles it all.
If you are looking for the best ISI mark stainless steel door fittings or CrownISI stainless steel butt hinges , this guide covers everything you need to know about SS 304 butt hinges—features, prices, installation, and more.
What Are SS 304 Stainless Steel Butt Hinges?
Let us start with the basics. A butt hinge is the classic hinge you see on most doors. Two flat metal plates—called leaves—joined by a pin in the middle. One leaf screws into the door. The other screws into the frame. When the door opens, the leaves rotate around the pin.
The word "butt" comes from the way the two surfaces butt against each other when the door is closed.
Now, the "SS 304" part is where the magic happens. Stainless steel comes in different grades. 304 is the good one. It has 18% chromium and 8% nickel. The chromium forms a protective layer on the surface. If the steel gets scratched, that layer heals itself. That is what stops rust.
SS 304 stainless steel butt hinges are used for:
Wooden doors
Metal cabinets
Heavy main doors
Bathroom and kitchen shutters
When you buy SS Butt Hinges made from SS 304 stainless steel, you get high corrosion resistance and load-bearing capacity.
SS 304 vs SS 202: What Is the Difference?
Not all stainless steel is the same. Lower grades like 201 or 202 save money by using less nickel. They look similar in the shop. But put them in a humid bathroom or an outdoor gate, and within a year, those brown spots start showing up.
Here is a quick comparison:
| Feature | SS 201 / SS 202 | SS 304 |
|---|---|---|
| Chromium | 16-18% | 18%+ |
| Nickel | 3.5-5.5% | 8%+ |
| Rust Resistance | Average | Excellent |
| Best For | Dry indoor use only | Outdoor, humid, coastal areas |
| Lifespan | 3-5 years | 15+ years |
| Price | Lower | Higher |
SS 202 rusts after 2-3 years in humid air. SS 304 does not rust even in humid or coastal areas.
Key Features of SS 304 Stainless Steel Butt Hinges
When you are shopping for SS Butt Hinges, here are the features that actually matter.
1. Material Grade
Always look for 304 grade. Some hinges say "stainless steel" but are actually 201 or 202. Ask the seller. Check the packaging. If it does not say 304, be careful.
A genuine hinge will have "SS 304" or "304G" engraved. If you see no mark, do not buy.
For information on 304 stainless steel butt hinge specifications and mounting options, visit Grainger – Stainless Steel Butt Hinge Specifications .
2. Thickness
Hinges come in different thicknesses, measured in millimeters or gauge. A 3mm thick hinge is much stronger than a 1.6mm hinge.
| Door Type | Recommended Thickness |
|---|---|
| Light cabinets | 1.2 mm |
| Standard wooden door | 2.0 mm to 2.5 mm |
| Heavy main door | 3 mm |
3. Pin Type
The pin holds everything together. Some pins are removable, some are fixed. Removable pins let you take the door off easily for maintenance or moving furniture. Fixed pins are cheaper but less convenient.
Some hinges have ball bearings inside the knuckles. These bearings make the hinge move smoothly even under heavy weight. If you have a heavy door, ball bearing hinges are worth the extra money.
At Crown ISI, we offer both 2 Ball Bearing Hinges and 4 Ball Bearing Hinges.
4. Knuckle Design
The knuckles are the round parts where the pin goes through. More knuckles mean more strength. A standard hinge has three knuckles on one leaf and two on the other. Heavy duty ones might have more.
5. Finish
SS 304 hinges come in different finishes. Matt, satin, polished. Choose one that matches your classic door fittings accessories like handles and towers.
| Finish | Appearance | Best For |
|---|---|---|
| Satin | Brushed, non-reflective | Most residential and commercial doors |
| Mirror | Highly polished | Luxury homes, commercial spaces |
| Matt | Flat, non-reflective | Modern interiors |
6. Welded vs Non-Welded
Stainless steel welded hinges have the hinge pin welded into one leaf. It cannot be removed. This stops thieves from pulling out the pin and removing the door. It also keeps the hinge tight for many years.
For main doors, always choose welded.
Benefits of SS 304 Stainless Steel Butt Hinges
Here is why SS 304 butt hinges are the smart choice for any door.
1. No Rust, Even in Humid Conditions
SS 304 contains 18% chromium and 8% nickel. It does not rust even in humid or coastal areas. Even in coastal cities like Mumbai, Chennai, or Kolkata, these hinges stay smooth and strong.
2. Exceptional Strength and Load-Bearing Capacity
SS 304 handles heavy door weight without bending. A good SS butt hinge with 3mm thickness can support doors up to 120kg.
3. Low Maintenance
Stainless steel hinges do not wear out easily, do not rust or tarnish, and retain a good appearance for years. All it needs is occasional wiping.
4. Long Lifespan
SS 304 hinges last 15+ years, while lower grades may fail in 3-5 years.
5. Modern Aesthetic Appeal
SS 304 hinges keep their polish for years. They offer a sleek, contemporary look that complements both modern and traditional interiors.
6. Hygienic Properties
Stainless steel has a smooth, non-porous surface that does not harbour bacteria. This makes it a hygienic choice for healthcare facilities, food processing areas, and other environments where cleanliness is critical.
7. Fire Safety
SS 304 stainless steel is non-combustible and can withstand high temperatures. This makes it a safer choice for fire-rated doors and buildings where fire safety is a concern.
8. 100% Recyclable
Stainless steel is 100% recyclable. It can be recycled repeatedly without losing its properties. This makes it an environmentally friendly choice for sustainable construction projects.
SS 304 Stainless Steel Butt Hinges Price Guide
The price of SS 304 butt hinges varies based on several factors:
Factors Affecting Price
| Factor | Impact on Price |
|---|---|
| Size | Larger hinges cost more |
| Thickness | Thicker hinges cost more |
| Grade | SS 304 costs more than SS 202 |
| Ball Bearings | Ball bearing hinges cost more than standard |
| Welded vs Non-Welded | Welded hinges cost more |
| Finish | Mirror finish costs more than satin |
| Brand | ISI-certified brands cost more than unbranded |
Approximate Price Range (For Reference)
| Hinge Type | Size | Thickness | Approximate Price Range |
|---|---|---|---|
| SS 304 Butt Hinge | 3 inch | 1.5-2.0 mm | ₹38-60 per piece |
| SS 304 Butt Hinge | 4 inch | 2.0-2.5 mm | ₹60-100 per piece |
| SS 304 Butt Hinge | 5 inch | 2.5-3.0 mm | ₹80-120 per piece |
| SS 304 Ball Bearing Hinge | 4 inch | 3.0 mm | ₹150-250 per piece |
Why ISI Mark Matters for Price
From October 2023, all door fittings sold in India must have ISI certification. This includes handles, hinges, tower bolts, and other hardware.
The ISI mark ensures that the product meets Indian quality and safety standards. It guarantees that you are getting a reliable, quality product.
ISI mark stainless steel door fittings from Crown ISI give you peace of mind that your hardware meets the highest standards. Yes, ISI-certified hinges may cost a little more. But they are worth every rupee because they last for decades.
SS Butt Hinges Sizes and Specifications
Choosing the right size and thickness is crucial for proper door function.
Standard Sizes
SS Butt Hinges are available in various sizes. The size is typically given as length x width.
| Size (Inch) | Size (mm) | Common Use |
|---|---|---|
| 3 x 1.5 x 1.5 | 75 x 38 x 38 | Light cabinets, small doors |
| 3.5 x 1.75 x 1.75 | 88 x 44 x 44 | Bathroom doors, lightweight doors |
| 4 x 3 x 3 | 100 x 75 x 75 | Standard bedroom doors |
| 5 x 3 x 3 | 125 x 75 x 75 | Heavy doors, main entrance |
| 6 x 4 x 4 | 150 x 100 x 100 | Extra heavy doors, commercial use |
How Many Hinges Do You Need?
| Door Height | Number of Hinges |
|---|---|
| Up to 7 feet | 2-3 hinges |
| 7 to 8 feet | 3 hinges |
| Over 8 feet | 4 hinges |
A standard 2040 high x 820 wide door needs 3 hinges. When using a door closer, a minimum of 4 hinges is recommended, with the top hinge located as high as possible.
Installation Guide for SS 304 Stainless Steel Butt Hinges
Proper installation is crucial for the door to function correctly. Here is a step-by-step guide.
Tools You Will Need
Measuring tape
Pencil or marker
Hammer and chisel (for mortising)
Drill with drill bits
Screwdriver
Level
Screws (provided with the hinge)
Step 1: Determine Hinge Placement
Top hinge: 5-7 inches from the top of the door
Bottom hinge: 10-11 inches from the bottom of the door
Middle hinge: Centered between the top and bottom hinges
Step 2: Mark and Score the Hinge Mortise
For wooden doors, you need to cut a recess (mortise) for the hinge leaf so that it sits flush with the door surface. This ensures a clean look and proper operation.
Place the hinge on the door edge
Mark around the hinge leaf with a pencil
Score the outline with a utility knife
Chisel out the marked area to the depth of the hinge leaf
Step 3: Drill Pilot Holes
Drill pilot holes to prevent wood splitting. Use the appropriate drill bit size for the screws provided with the hinge.
Step 4: Attach the Hinge to the Door
Place the hinge in the mortise
Align the screw holes
Screw the hinge into place using the provided screws
Step 5: Attach the Hinge to the Door Frame
Hold the door in position against the frame
Mark the position of the second leaf on the frame
Repeat the mortising and screw installation process
Step 6: Check the Door Swing
Make sure the door swings freely without binding against the frame. If the door sticks, the hinges may not be aligned properly.
For practical installation tips including pilot hole drilling and alignment, visit Pinnacle – Gate Hinge Installation Guide .
Installation Tips
For Heavy Doors: Use at least 4-inch SS butt hinges. Consider using ball bearing hinges for smoother operation.
Ensure Proper Alignment: Carefully measure and adjust hinge placement before final installation. Misalignment can lead to uneven door movement.
Use the Right Screws: Always use the screws that come with the hinge. They are the right length and gauge for the hinge. For heavy doors, consider using longer screws that go deeper into the door frame for extra strength.
Minimum Door Thickness: For stainless steel butt hinges, minimum door thickness should be 35mm.
For step-by-step installation tips for a perfect fit, visit Desgold Hardware – Stainless Door Hinge Installation Tips .
For an installation guide with minimum door thickness and hinge placement recommendations, visit Access Hardware – Butt Hinge Installation Guide .
Common Installation Mistakes to Avoid
1. Misalignment
Hinges may not be aligned properly when installed, leading to uneven door movement.
Solution: Carefully measure and adjust hinge placement before final installation.
2. Over-Tightening
Tightening screws too much can damage the hinge or the door material.
Solution: Use a torque screwdriver to avoid applying excessive force.
3. Wrong Size
Using the wrong size hinge for the door can lead to inadequate support.
Solution: Select hinges that match the specifications of the door and frame.
4. Surface Damage
Poor handling can scratch or dent the hinge surface, impacting aesthetics.
Solution: Handle hinges carefully during installation and store them properly.
For a detailed guide on installation issues, misalignment, and solutions, visit Monsoon Hardware – Understanding the Challenges of Using Stainless Steel Butt Hinges .
Why Choose Crown ISI for SS 304 Stainless Steel Butt Hinges?
When you need SS 304 stainless steel butt hinges , SS Butt Hinges , or ISI mark stainless steel door fittings , Crown ISI is the name you can trust.
Over 39 Years of Experience
Crown Industries has been manufacturing high-quality door fittings for over 39 years. Our products are trusted by government departments, semi-government organizations, and public sector undertakings across India.
Genuine SS 304G Material
Crown ISI uses only genuine 304G stainless steel. No mixing. No cheap metal. Every hinge is made from virgin SS 304 raw material—no recycled scrap, no mixing of grades.
Rigorous Quality Control
Every Stainless Steel Hinges 304G from Crown ISI passes:
Thickness test – Ensuring consistent thickness
Load test – Verifying strength and load capacity
Salt spray test – 200-hour salt spray test for rust resistance
Screw alignment – Ensuring screw holes align perfectly with Indian door frames
ISI-Certified Products
All Crown ISI products carry the ISI mark, ensuring they meet Indian quality and safety standards.
Complete Range of Products
Crown ISI offers a complete range of stainless steel door accessories including:
SS Butt Hinges – Available in multiple sizes and thicknesses
Stainless steel welded hinges – For heavy and security doors
4 Ball Bearing Hinges – For smooth, quiet operation
SS door handles
Cylinder door locks
Aldrops (sliding door bolts)
Tower bolts
Trusted by Professionals
Crown ISI is trusted by architects, builders, and homeowners across India. Our products are known for sleek design with heavy-duty performance and affordable pricing.
Frequently Asked Questions (FAQs)
1. What is the difference between SS 202 and SS 304 stainless steel butt hinges?
SS 304 contains 18% chromium and 8% nickel, giving it excellent corrosion resistance. SS 202 has less nickel and chromium, making it cheaper but less durable. SS 304 does not rust, even in humid or coastal areas, while SS 202 may show signs of rust within 2-3 years.
2. How do I know if a hinge is real SS 304?
A genuine SS 304 stainless steel butt hinge will have "SS 304" or "304G" engraved on it. If it is not there, assume it is a lower grade.
3. What is the ISI mark, and why is it important?
The ISI mark is a certification from the Bureau of Indian Standards that ensures the product meets Indian quality and safety standards. From October 2023, all door fittings sold in India must have ISI certification.
4. What size of SS butt hinges should I buy?
For normal doors, use 4 inch or 5 inch hinges. For heavy doors, use 6 inch with 3mm thickness.
5. How many hinges do I need for a wooden door?
For a standard 7 feet by 3 feet bedroom door, use three 4-inch SS butt hinges. For heavier or taller doors (90+ inches), use four hinges or larger sizes.
6. What is the difference between butt hinges and welded hinges?
Butt hinges have two leaves joined by a pin. Welded hinges have the pin welded into one leaf, making them more durable and tamper-resistant.
7. Are ball bearing hinges better than standard hinges?
Ball bearing hinges reduce friction and allow smoother operation, especially for heavy doors. They are ideal for high-traffic areas and heavy doors. Crown ISI offers both 2 Ball Bearing and 4 Ball Bearing Hinges.
8. How do I maintain stainless steel butt hinges?
Wipe them with a damp cloth regularly. For deeper cleaning, use a mixture of vinegar and water. Lubricate the hinge pin with silicone spray or graphite powder every few months.
9. Can I use stainless steel hinges on a wooden door?
Yes. Stainless steel hinges work perfectly on wooden doors. They are strong enough to support heavy wooden doors and will not rust over time.
10. Why should I choose Crown ISI for stainless steel door fittings?
Crown ISI has been manufacturing high-quality door fittings for over 39 years. Our products are ISI-certified, made from virgin SS 304 raw material, and undergo rigorous quality checks including a 200-hour salt spray test.
Final Thoughts
A door hinge may seem like a small detail, but it makes a big difference. A poor-quality hinge will rust, sag, squeak, and eventually fail. A high-quality SS 304 hinge will stay strong, smooth, and rust-free for decades.
If you are looking for the best SS 304 stainless steel butt hinges , SS Butt Hinges , or ISI mark stainless steel door fittings , look no further than Crown ISI .
With over 39 years of experience, ISI-certified products, virgin SS 304 raw material, and rigorous quality control, Crown ISI is the name you can trust for all your door hardware needs.
Visit our products page to explore our full range of stainless steel butt hinges, welded hinges, and door accessories. For our complete range of door fittings, check out our stainless steel door accessories page.
Contact us today for more information or to place your order.
Contact Information
Crown Industries
Factory: 39/2/9A, Site IV, Industrial Area, Sahibabad, Distt. Ghaziabad (U.P.)
Office: 500 Kuchha Pati Ram, Bazar Sita Ram, Delhi 110006
Phone: +91 98111 07515
