14 Feb, 2026 When you build or renovate a home, the small things matter the most. The handle you touch every day, the bolt that locks your bathroom, the hinge that holds your main door—these are door fittings. If they break, your privacy is gone.
For years, Mild Steel (MS) has been the top choice for these items in India. It is strong, cheap, and easy to shape. But with so many options in the market, how do you pick the right one? You must look for two things: the ISI mark and a trusted brand.
In this guide, we will cover everything about mild steel door fittings, why ISI Mark Mild Steel Door fittings are a must, and how Crown Stainless Steel Door fittings from Crown ISI offer the best of both worlds.
What Are Mild Steel Door Fittings?
Mild steel door fittings are hardware items made from low-carbon steel. You use them on doors, windows, and cupboards. Common examples are tower bolts, handles, hinges, and sliding door bolts .
Mild steel is an alloy of iron and carbon. It has less carbon than other steels, which makes it ductile. That means you can hammer it into shape without breaking it. It is also very tough and does not cost much .
Because of these reasons, Indian homes have used mild steel fittings for decades. They can handle the daily push and pull very well.
Why the ISI Mark Matters for Mild Steel Hardware
If you go to a local market, you will see cheap fittings that look shiny but break in months. To stop this, the government made quality checks compulsory.
The ISI mark is a certification from the Bureau of Indian Standards (BIS). When you see this mark, it means the product has passed strict tests .
Government Rules Are Strict Now
From October 2023, the government made ISI certification mandatory for all door fittings. This includes tower bolts and other hardware. If a product does not have the ISI mark, it is not allowed to be sold. This rule protects you from buying weak, unsafe products .
What Does ISI Ensure?
When you buy ISI Mark Mild Steel Door fittings, you get:
- Correct Material: The steel has the right mix of chemicals.
- Right Size: The rod thickness and length match the Indian Standard (like IS 281 for sliding bolts or IS 204 for tower bolts) .
- Strong Finish: The paint or coating is tested so it does not peel off fast.
Common Types of Mild Steel Door Fittings
There are many types of fittings. Here are the ones you see most often:
1. Tower Bolts
A tower bolt is a simple sliding bar. You fix it on one door shutter. The bar slides into a hole in the frame to lock the door. They are used on bathrooms, bedrooms, and windows.
- ISI Standard: IS 204 (Part 1) .
- Sizes: From 100 mm to 300 mm .
2. Sliding Door Bolts (Aldrops)
These are used with padlocks. You often see them on gates or main doors from the outside. They have a long bar that lifts and slides. The Indian Standard for these is IS 281 .
3. Door Handles
Mild steel handles are strong and give a solid feel. Brands like Crown ISI make Mild Steel DOOR HANDLE (SPECIAL TYPE) that are durable and affordable .
4. Hinges
Hinges are what make your door swing. Mild steel butt hinges are standard for internal wooden doors. They take the weight of the door and must be rust-proof.
Mild Steel vs. Stainless Steel: Which is Better?
This is a common question. Both have their place. Mild steel is stronger in terms of raw toughness, but it can rust if not coated well. Stainless steel looks better and never rusts, but it is more expensive.
That is why Crown Stainless Steel Door fittings are becoming popular. They combine the strength of steel with the shine of stainless.
The Problem with Plain Mild Steel
- Rust: If the paint scratches, water gets in, and the steel rusts.
- Looks: Over time, the paint fades.
The Solution: Stainless Steel Options
Stainless steel (like SS304) does not rust. It stays shiny forever. For places like the bathroom or kitchen, stainless steel is the king. But if you are on a budget for internal dry areas, good quality mild steel with an ISI mark works fine.
At Crown ISI, we offer both. You get the ISI Mark Mild Steel Door fittings for your general needs, and premium Crown Stainless Steel Door fittings for areas where water is a problem.
Why Choose Crown ISI for Your Door Fittings?
When you buy from Crown ISI, you are not just buying metal. You are buying safety and peace of mind.
Trusted Manufacturer
Crown Industries, based in Ghaziabad (Delhi NCR), has been serving the market for decades. They are known for quality hardware .
Full ISI Compliance
All products from Crown ISI follow the latest BIS rules. Whether it is IS 204 for tower bolts or IS 281 for sliding bolts, you get the exact standard .
Wide Range
You can find everything:
- Mild Steel Tower Bolts (ISI marked) in black, zinc, or chrome finish.
- Mild Steel Handles .
- Crown Stainless Steel Door fittings for a modern, rust-free look.
Best Prices
Because Crown ISI sells directly to dealers and contractors, you get wholesale rates without compromising on quality .
Tips for Buying Door Fittings
Here is some simple advice before you spend your money:
- Look for the ISI Logo: Do not just listen to the shopkeeper. Check the product for the ISI stamp and the standard number (like IS 204).
- Check the Finish: A good coating should be even. If it is powder coated or chrome plated, it will last longer.
- Feel the Weight: A heavy product usually means more steel and better strength.
- Slide It: If you are buying a bolt, slide it in the shop. It should move smoothly without sticking.
- Choose the Right Material: For bathrooms and outdoors, go for Crown Stainless Steel Door fittings. For bedrooms and cupboards inside the house, ISI Mark Mild Steel Door fittings are perfect and save money.
Conclusion
Your home deserves the best protection. Mild steel door fittings are the backbone of your home's security. But only buy them if they have the ISI mark. Cheap, non-ISI fittings will rust, break, and fail you when you need them most.
With brands like Crown ISI, you get the best of both worlds. You get the strength of mild steel with the guarantee of quality, plus the option of premium stainless steel for a modern finish. Always choose quality. Always choose Crown ISI.
Frequently Asked Questions (FAQs)
1. What are isi mark mild steel door fittings?>
isi mark Mild steel door fittings are hardware products like handles, tower bolts, and hinges made from low-carbon steel. They are known for their strength and low cost, making them ideal for Indian homes .
2. Why is the ISI mark important for door fittings?
The ISI mark is a quality certificate from the Bureau of Indian Standards. It ensures the product is made with the correct material, has the right dimensions, and will last long. It has been mandatory for door fittings since October 2023 .
3. What is the Indian Standard for mild steel tower bolts?
The standard for mild steel (ferrous) tower bolts is IS 204 (Part 1):1991 .
4. Where can I buy Crown Stainless Steel Door fittings?
You can buy them from major hardware stores in Delhi NCR, Ghaziabad, and Ludhiana. You can also contact the manufacturer, Crown ISI, directly for wholesale purchases .
5. Are stainless steel fittings better than mild steel?
Stainless steel is better for wet areas because it does not rust. Mild steel is very strong and affordable for dry areas. Crown Stainless Steel Door fittings are perfect for modern homes needing a rust-proof finish .
6. What sizes of tower bolts are available?
Tower bolts usually come in lengths from 100mm (4 inches) to 300mm (12 inches). The most common sizes for homes are 6, 8, and 10 inches .
7. How do I know if a product is ISI certified?
Look for the ISI logo stamped on the product itself. You can also check the packaging for the BIS license details and the standard number like IS 281 or IS 204 .
8. What is the difference between a tower bolt and a sliding door bolt?
A tower bolt is a simple rod that slides into a hole on the frame. A sliding door bolt (aldrop) is usually longer and designed to be used with a padlock for extra security on gates .
9. Does Crown ISI make handles?
Yes. Crown ISI manufactures a variety of items, including the Mild Steel DOOR HANDLE (SPECIAL TYPE) , which is popular in the market for its durability .
10. What finish is best for mild steel fittings?
For mild steel, powder-coated or chrome-plated finishes are best as they protect the steel from rust. Crown ISI offers fittings in black, zinc, and chrome-plated finishes .
