Vimal Industrial Corporation is a trusted supplier and stockist of DIN 557 Square Nuts based in Mumbai, India. These precision‑engineered four‑sided nuts are designed for high‑strength fastening applications where a larger bearing surface and increased torque grip are essential. Square nuts are widely used in construction, heavy machinery, railway assemblies, and wooden structures due to their ability to provide strong clamping force and easy wrench engagement.
Manufactured in compliance with the DIN 557 standard, these nuts feature a square profile with chamfered edges and standard metric threads. The four‑flat design offers more surface contact with the workpiece compared to hex nuts, reducing the risk of rounding and enabling higher tightening forces. Available in high‑tensile carbon steel, stainless steel, and brass, DIN 557 square nuts provide dependable fastening solutions for both indoor and outdoor applications.
The popularity of DIN 557 Square Nuts lies in their simplicity, strength, and reliability. Their large contact area ensures even load distribution, making them ideal for fastening softer materials like wood and certain plastics, as well as for structural metal connections. The square profile also offers excellent resistance to loosening under vibration when used with lock washers or as part of a bolted assembly.
At Vimal Industrial Corporation, we stock DIN 557 nuts in a wide range of sizes, property classes, and finishes including plain, zinc‑plated, hot‑dip galvanized, black oxide, and PTFE‑coated options. As an authorized APL Fasteners dealer, we ensure that every nut meets strict dimensional accuracy and mechanical performance standards. With a strong inventory and a nationwide distribution network, we cater to OEMs, MRO suppliers, contractors, and industrial projects with prompt deliveries and full traceability.
DIN 557 square nuts are preferred in applications requiring strong clamping, increased bearing surface, and anti‑slip torque characteristics.
Common Applications Include:
Construction & Infrastructure – Structural bolting in bridges, buildings, and steel frameworks
Railway & Transportation – Track fastening systems and carriage assemblies
Woodworking & Carpentry – Securing timber joints and heavy furniture components
Heavy Machinery & Equipment – High‑torque connections in mechanical systems
Electrical & Utility Installations – Mounting panels, cable trays, and supports
General Engineering – Versatile fastening for diverse industrial uses
As a long‑standing name in the Indian fasteners industry, Vimal Industrial Corporation is committed to delivering high‑quality DIN 557 square nuts with unmatched reliability and customer service.
Why clients choose us:
✅ Authorized APL Fasteners Dealer – Genuine products with complete documentation
✅ Extensive Stock Availability – Multiple grades, sizes, and finishes ready for dispatch
✅ Bulk Order Fulfilment – Capable of meeting large‑scale industrial requirements
✅ Technical Expertise – Guidance on correct torque, material selection, and application
✅ Pan‑India Delivery – Efficient logistics network ensuring timely shipments
✅ Quality Assurance – Products tested to DIN and ISO standards with MTCs available
Whether for construction projects, machinery assembly, or maintenance work, we provide a seamless procurement experience with dependable supply and competitive pricing.
| Thread size d |
dimensions in mm | |||||
|---|---|---|---|---|---|---|
| M5 | M6 | M8 | M10 | M12 | M16 | |
| P | 0,8 | 1 | 1,25 | 1,5 | 1,75 | 2 |
| dw min. |
6,7 | 8,7 | 11,5 | 14,5 | 15,5 | 22 |
| e max. |
11,3 | 14,1 | 18,4 | 22,6 | 24 | 33,9 |
| e min. |
9,93 | 12,53 | 16,34 | 20,24 | 21,54 | 30,11 |
| m Nominal size max. |
4 | 5 | 6,5 | 8 | 10 | 13 |
| m min. |
3,52 | 4,52 | 5,92 | 7,42 | 9,42 | 12,3 |
| mw min. |
2,5 | 3,2 | 4,1 | 5,2 | 6,6 | 8,6 |
| s Nominal size max. |
8 | 10 | 13 | 16 | 17 | 24 |
| s min. |
7,64 | 9,64 | 12,57 | 15,57 | 16,57 | 23,16 |
| weight kg/1000pcs |
1,31 | 2,77 | 5,5 | 10,7 | 13 | 38,2 |
A DIN 557 nut has a larger surface area, which provides a stronger grip against the material. This prevents the nut from spinning or loosening in high-vibration assemblies. In India, these are highly preferred for railway tracks and heavy machinery where a “blind” installation is required.
The square shape allows the DIN 557 nut to sit perfectly in a slot or channel, locking it in place. This allows you to tighten the bolt fastener from one side without needing a second wrench to hold the nut, making it ideal for tight industrial spaces.
Yes, they are commonly available in Zinc-plated steel and Stainless Steel Fasteners (A2/A4). If your project is located in Mumbai, using SS 316 grade ensures that the square nut won’t rust or seize even when exposed to salty sea air.
Yes, because they have more contact area with the surface, they distribute the pressure more evenly than hex nuts. This makes them a great bolt fastener choice for wood or soft metal applications where you want to avoid crushing the material.
Check for clean internal threads and a smooth, burr-free finish on all four sides. A trusted Nut Bolt Supplier like Vimal Industrial provides Industrial Hardware that meets strict DIN tolerances, ensuring a perfect fit every time.
