We are trusted Allen Bolt Manufacturers in India. We provide socket head cap screws, also known as Allen bolts, which are precision fasteners with a cylindrical head and an internal hexagonal socket. They are tightened with an Allen key (hex key), which can be tightened with higher torque than normal nuts and bolts. Because the driving tool fits inside the head, Allen Bolts require minimal clearance around them, making them ideal for use in machines, assemblies, and small mechanical systems.
High clamping capacity, precision, and appealing looks have made them one of the most famous fastening systems in engineering, fabrication, automobiles, furniture, and machine manufacturing.
The Preferred Engineering Solution is Allen bolts.
Allen bolts are engineered fastening solutions that engineers apply to fairly critical locations in which precision and reliability are imperative.
Key advantages:
- High-torque no-slip transmission.
- The system increases load redistribution and ensures a tight clamp.
- During installation, it can fit into restricted areas with ease.
- The system ensures minimal head trauma during installation.
- Simple installation and uninstallation.
- Professional and clean finish.
Using the internal driving socket reduces the possibility of tool slippage compared to traditional hex bolts. This is particularly critical with the mechanical assemblies, where excessive tightening or stripping can lead to equipment failure.
Types of Allen Bolts
We supply Allen bolts in all sizes, suitable for a wide range of industrial and mechanical applications:
- Socket Head Cap Screw (Allen Cap Bolt)
It is the most used form of Allen bolt. It fits with a deep hex socket and tall cylindrical head, which enables full torque to be used.
| Parameter |
Specification |
| Standard |
DIN 912 / ISO 4762 / ASTM A574 |
| Material |
Alloy Steel / Stainless Steel (SS 304, SS 316) |
| Size Range |
M3 to M36 |
| Length |
6 mm to 200 mm |
| Thread Type |
Metric / UNC / UNF |
| Thread Pitch |
Coarse / Fine |
| Grade |
8.8, 10.9, 12.9 |
| Head Type |
Cylindrical Head |
| Drive Type |
Hex Socket (Allen Key) |
| Tensile Strength |
800 – 1200 MPa (depending on grade) |
| Proof Load |
As per ISO standards |
| Hardness |
HRC 22 – 39 |
| Surface Finish |
Black Oxide / Zinc Plated / Plain / SS Finish |
| Coating Thickness |
5 – 20 microns |
| Corrosion Resistance |
Moderate to High (depends on material/finish) |
| Temperature Range |
-40°C to 300°C |
| Application |
Machinery / Automotive / Industrial Equipment / Precision Assembly |
| Manufacturing Process |
Cold Forged / Heat Treated |
| Inspection |
Dimensional / Mechanical / Hardness Testing |
Applications:
- Industrial machinery
- Automotive assemblies
- Machine tools
- Pumps and motors
- Button Head Allen Bolt
The head of the button-head bolts is rounded and of low profile. They are popular in areas that are appearance-conscious or where sharp edges are required to be avoided.
Applications:
- Furniture manufacturing
- Consumer products
- Panels and sheet metal parts
- Electronics housings
- Allen Bolt (Countersunk) Flat Head
Flathead Allen bolts are made so that the head is conical in shape, and when attached, the head is flat and even.
Applications:
- Furniture
- Structural frameworks
- Bridge decking
- Fabricated and wooden parts
- Low Head Allen Bolt
Due to their lower head height, they are used in locations with very little space where a standard socket head cannot fit.
Applications:
- Compact assemblies
- Robotics
- Sliding mechanisms
- Machine covers
- Socket Set Screws (Socket screws)
Grub screws are threaded all the way and do not have a bulging head. They are applied in order to lock one part with another.
Applications:
- Gear assemblies
- Pulleys
- Shafts
- Bearings and collars
Available Materials and Grades
The manufacture of Allen bolts is done in various materials depending on the conditions of load, exposure to corrosive environments, and operating conditions.
High-Tensile Alloy Steel
They are load-taking bolts, and they are heavy-duty bolts. Available grades include:
- 8.8 Grade – Medium general engineering.
- 10.9 Grade – Automobile and mechanical systems.
- 12.9 Grade – High-stress machine and industrial assemblies.
Surface finishes:
- Black oxide
- Zinc plated
- Phosphate coating
Stainless Steel Allen Bolts
Wet and outdoor use. The stainless steel bolts are resistant to corrosion and can be used in outdoor and wet conditions.
- SS 304 is used for general industrial and commercial applications.
- SS 316 is suitable for use in marine, chemical, and food processing applications.
Other Materials: Carbon, Steel, Brass
Titanium alloys are lightweight and possess high strength.
Nickel alloys are known for their chemical resistance and high-temperature qualities.
Sizes and Standards
The Allen bolts are produced according to the international fastening standards:
Available in:
Metric sizes: M3, M4, M5, M6, M8, M10, M12, M16, M20 and larger.
Inch (Imperial) sizes
The key parameters are:
- Diameter
- Length
- Thread pitch (coarse/fine)
- Head dimensions
- Required Allen key size
Industrial Applications
Allen bolts are applied in nearly all the mechanical sectors due to their durability and accuracy.
Major industries served:
- Automobile manufacturing
- Food processing equipment.
- Agricultural equipment
- Pumps and compressors
- Electrical panels
- Fabrication and metal works
- The robotics and automation systems
Trusted Allen Bolts Suppliers in India
We are trusted Allen Bolts Suppliers in India; hence, we always have ready-to-deliver stock in various grades, sizes, and finishes to satisfy the immediate needs of the industry. We have a fine inventory system that guarantees the involvement of the OEM, workshops, and maintenance contractors. Each batch undergoes a dimensional and strength check to ensure reliable performance even under extreme usage.
Allen Bolts Wholesalers in India
We are trusted Allen Bolts Wholesalers in India, a source of repeat orders because of competitive prices, large-volume supply, and dependable quality. We sell bulk quantities and individual quantities according to the customer's needs.
Allen Bolts Dealers in India
As we are an authorised Allen Bolts Dealers in India, we provide technical support in choosing the relevant grade and size for specific applications. Our staff assists the customers in balancing the bolt strength and the load conditions to avoid premature failure and enhance the equipment life.
Quality Assurance
Strict quality control procedures are provided with all Allen bolts:
- Dimensional inspection
- Thread accuracy testing
- Hardness testing
- Check of tensile strength.
- Corrosion-resistant test (plated and stainless steel)
This provides consistency in heavy-load and vibration-sensitive installations.
Contact Us Today
Kiran Industries will provide you with the best quality of strong, precise Allen bolts. Contact us today. A business can rely on a reliable supplier, wholesaler, and dealer for competitive pricing, bulk buying, and professional assistance.
