Vimal Industrial Corporation supplies DIN 603 Carriage Bolts designed for applications where a neat surface finish and secure fastening are required. These bolts feature a rounded head with a square neck underneath, allowing them to lock into the assembly material and prevent rotation during tightening.
Manufactured as per DIN 603 specifications, these bolts provide a practical fastening solution for wood, metal, and general fabrication applications. The smooth domed head offers a clean appearance on the exposed side, while the square neck helps maintain stability by holding the bolt in position during installation.
DIN 603 Carriage Bolts are commonly used in furniture manufacturing, woodworking, construction assemblies, and industrial fabrication where reliable joining between components is required. Their design makes them suitable for applications where access to the bolt head side is limited and secure installation is important.
Available in different sizes, materials, and surface finishes, Vimal Industrial Corporation supplies DIN 603 Bolts to meet varied project requirements. With experience in industrial fastener supply, we help customers source suitable fastening solutions based on application needs, material preferences, and order specifications.
DIN 603 Round Head Square Neck Bolts are designed for applications where a clean surface finish and secure fastening arrangement are required. The rounded head provides a smooth external appearance, while the square neck section below the head grips the base material and prevents rotation during tightening. This design makes them suitable for assemblies where fastening needs to be completed from one side.
Commonly used in woodworking, fabrication, furniture assembly, and structural applications, these carriage bolts provide a practical solution for creating stable joints between different components. Their consistent dimensions and functional design allow for easier installation while maintaining a neat finish after assembly.
As an authorized APL Fasteners dealer, Vimal Industrial Corporation supplies DIN 603 Carriage Bolts in stainless steel variants with attention to dimensional accuracy and application requirements. We support industrial buyers, fabricators, and OEMs with dependable sourcing of stainless steel fasteners for different project needs
We offer DIN 603 bolts in a wide range of metric sizes (M5 to M20), lengths, and material grades. These bolts conform to DIN 603 standards, ensuring uniform dimensions, high performance, and compatibility across applications. Below are the standard specifications we supply:
| Parameter | Specification |
|---|---|
| Standard | DIN 603 |
| Bolt Type | Round Head with Square Neck |
| Thread Type | Metric (Full/Partial Thread) |
| Sizes Available | M5, M6, M8, M10, M12, M16, M20 |
| Length Range | 10mm to 200mm (varies by diameter) |
| Material Options | Stainless Steel (A2, A4) |
| Grades | A2-70, A4-70 (SS) |
| Surface Finishes | Self-Color |
| Head Style | Domed / Mushroom Head |
| Neck Type | Square (anti-rotation feature) |
| Applications | Wood-to-Metal, Railways, Fencing, Furniture, Construction |
DIN 603 Round Head Square Neck Bolts are widely used in applications where a neat appearance, secure fastening, and controlled installation are required. Their square neck design helps keep the bolt fixed in position during tightening, making them suitable for assemblies where access to the bolt head side is limited.
Common application areas include:
Wood and Timber Structures
These bolts are commonly used in timber assemblies, wooden frameworks, and joinery applications where a firm connection between components is required without affecting the surface finish.
Furniture Manufacturing
The smooth rounded head makes DIN 603 Carriage Bolts suitable for furniture applications where visible fasteners need to maintain a clean and finished appearance.
Railway and Infrastructure Components
Used in selected railway and infrastructure assemblies, these bolts help secure components where consistent fastening and durability are important.
Fencing and Outdoor Installations
Stainless steel variants are suitable for fencing, gates, and outdoor structures where resistance to environmental exposure and a neat finish are preferred.
Automotive and Trailer Applications
These bolts are used in trailer bodies, vehicle assemblies, and related fabrication work where reliable joining of components is required.
Construction and Fabrication Work
DIN 603 Bolts support various fabrication and construction requirements where stable fastening and easy installation are important.
Industrial Assembly Applications
Used across different engineering applications, these bolts provide a practical fastening option for assemblies requiring secure positioning and a clean external finish.
As established bolts and nuts suppliers in Mumbai, Vimal Industrial Corporation stocks DIN 603 round head square neck bolts across all standard sizes, material grades, and finishes, ready for immediate dispatch to OEM units, contractors, and distributors across India.
Selecting the right fastener supplier is important for maintaining consistency across industrial projects and production requirements. Vimal Industrial Corporation supports customers with DIN 603 Round Head Square Neck Bolts that meet application needs through accurate specifications, dependable sourcing, and efficient order fulfilment.
Why businesses choose us for DIN 603 Bolts:
Whether you are an OEM, contractor, fabricator, or industrial buyer, Vimal Industrial Corporation provides DIN 603 Round Head Square Neck Bolts with a focus on accurate specifications, stainless steel quality, and dependable supply support.
| Parameter | M5 | M6 | M8 | M10 | M12 | M16 | M20 |
|---|---|---|---|---|---|---|---|
| Thread Pitch (P) | 0,8 | 1 | 1,25 | 1,5 | 1,75 | 2 | 2,5 |
| b (for ≤ 125mm length) | 16 | 18 | 22 | 26 | 30 | 38 | 46 |
| b (for 125 < l ≤ 200mm) | 22 | 24 | 28 | 32 | 36 | 44 | 52 |
| b (for > 200mm) | - | - | 41 | 45 | 49 | 57 | 65 |
| Head Diameter dk (max) | 13,55 | 16,55 | 20,65 | 24,65 | 30,65 | 38,8 | 46,8 |
| Head Diameter dk (min) | 12,45 | 15,45 | 19,35 | 23,35 | 29,35 | 37,2 | 45,2 |
| Square Neck Height (max) | 5 | 6 | 8 | 10 | 12 | 16 | 20 |
| Square Neck Width (mix) | 4,52 | 5,52 | 7,42 | 9,42 | 11,3 | 15,3 | 19,16 |
| Specification | Details |
|---|---|
| Material | Steel |
| General Requirements | According to DIN 267 Part 1 |
| Thread Tolerance | 8g |
| Thread Standard | DIN 13 Part 13 |
| Mechanical Properties Standard | DIN ISO 898 Part 1 |
| Product Grade | C (previously type g) |
| Dimensional Tolerance Standard | DIN ISO 4759 Part 1 |
| Surface Requirements |
DIN 267 Part 2 – Surface finish quality DIN 267 Part 9 – Galvanic surface protection DIN 267 Part 10 – Hot-dip galvanizing DIN 267 Part 19 – Surface defects acceptance |
| Acceptance Testing | According to DIN 267 Part 5 |
The smooth head is designed for both aesthetics and security. Since there is no slot or drive for a screwdriver on the head, the bolt fastener cannot be tampered with or unscrewed from the outside, making it a popular “security bolt.”
Yes, they can be used for metal if the receiving hole has a square punch to accommodate the neck. In India, these are frequently used in heavy-duty industrial racking and structural steel projects where a flush, snag-free finish is required.
Yes, but you must use stainless steel fasteners. The chemicals in pressure-treated wood can corrode standard steel or zinc coatings very quickly. Sourcing high-quality SS bolts from a trusted supplier like Vimal Industrial ensures long-term structural safety.
The hole diameter should match the bolt’s shank diameter exactly. If the hole is too large, the square neck won’t bite into the material, causing the bolt fastener to spin freely when you try to tighten the nut.
Look for clean threading and a well-defined square neck. Partnering with a reputable distributor like Vimal Industrial ensures that your carriage bolts meet international DIN 603 standards and come with the necessary material certifications.
