In many assemblies, even a small projection can cause issues, whether it’s movement obstruction or a poor finish. DIN 7991 Socket Head Countersunk Screws solve this by sitting flush within the surface, while still allowing proper tightening through the hex socket.
At Vimal Industrial Corporation, we supply DIN 7991 Socket Head Countersunk Screws for applications where alignment, clearance, and clean finishing are all important. These screws are commonly used in machine parts, fabricated components, sliding systems, and assemblies where the fastener should not interfere with operation or design.
We maintain ready stock across sizes, materials, and finishes to match different working conditions. As a dependable screw supplier in Mumbai and experienced fastener suppliers, we support both regular production and urgent maintenance needs. Our offering also includes stainless steel fasteners for applications exposed to moisture or demanding environments. The advantage is straightforward, secure fastening without surface interference, making them a practical fit for both functional and visible assemblies.
DIN 7991 Socket Screws are used where a flush surface is required without compromising fastening strength. The countersunk head sits level with the material, while the hex socket allows proper tightening in compact spaces.
At Vimal Industrial Corporation, we supply DIN 7991 Socket Head Countersunk Screws from M3 to M24 in property classes like 8.8, 10.9, and 12.9, along with stainless steel options for corrosion-resistant applications. These screws are commonly used in machine parts, fabricated components, and assemblies where clearance and alignment matter.
As a reliable screw supplier in Mumbai and experienced fastener suppliers, we maintain ready stock for both production and maintenance needs. Our range also includes stainless steel fasteners for long-term performance. Accurate dimensions like head angle and socket depth ensure proper fit and smooth installation, helping avoid rework and ensuring consistent fastening.
DIN 7991 Socket Screws are preferred in setups where the fastener must sit flush while still handling load and alignment properly. They are especially useful in designs where raised heads can affect movement, safety, or finishing.
Machine Building & Automation – Used in guides, frames, and plates where smooth movement requires no surface obstruction.
Metal Fabrication – Ideal for platforms, covers, and fabricated parts that need a clean, snag-free finish.
Automotive & Transport – Applied in components where flush or concealed fastening improves fit and safety.
Tooling & Fixtures – Helps in accurate clamping of plates and components in jigs and mould setups.
Electromechanical Equipment – Used in motors, gear assemblies, and couplings where access is limited and space is tight.
Maintenance & Replacement Work – Often used as an upgrade over standard bolts for better fit, finish, and strength.
These screws are mainly selected when flush fitting, proper alignment, and strong fastening are all required in the same application.
When sourcing DIN 7991 Socket Screws, the real concern is simple, will they fit right, sit flush, and perform without issues during installation. That’s where Vimal Industrial Corporation focuses its approach.
Why clients choose us:
✅ Authorized APL Fasteners Dealer – Genuine, standard-compliant supply with proper certification.
✅ Wide Stock Availability – Carbon steel and stainless steel fasteners across sizes and strength classes.
✅ Flexible Supply Options – Bulk orders, project kits, and customized packing as required.
✅ Practical Technical Support – Help with selection, countersink fit, and replacement matching.
✅ Fast Nationwide Dispatch – Reliable supply from Mumbai to industrial locations across India.
✅ Quality You Can Verify – Supplied with test reports and batch traceability.
✅ Easy Coordination – Quick quotes and smooth order handling without delays.
As a trusted screw supplier in Mumbai and experienced fastener suppliers, we make sure you get fastening solutions that actually work on-site, not just on paper.
| D | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | 24 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D1 | 6 | 8 | 10 | 12 | 16 | 4 | 24 | 27 | 30 | 36 | 39 |
| K | 1.7 | 2.3 | 2.8 | 3.3 | 4.4 | 6.5 | 6.5 | 7 | 7.5 | 8.5 | 14 |
| S | 2 | 2.5 | 3 | 4 | 5 | 8 | 8 | 10 | 10 | 12 | 14 |
| B | 12 | 14 | 16 | 18 | 22 | 26 | 30 | 34 | 38 | 46 | 54 |
All measurements are in mm
| L (mm) | Weight in kg(s) per 1000 pcs | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | 24 | |
| 6 | 0.47 | ||||||||||
| 8 | 0.50 | 0.92 | 1.60 | 2.35 | |||||||
| 10 | 0.56 | 1.07 | 1.85 | 2.70 | 5.47 | ||||||
| 12 | 0.65 | 1.23 | 2.10 | 3.05 | 6.10 | 10.01 | |||||
| 16 | 0.83 | 1.53 | 2.50 | 3.76 | 7.35 | 12.10 | 20.10 | ||||
| 20 | 1.00 | 1.84 | 3.09 | 4.46 | 8.60 | 14.10 | 21.20 | 24.80 | |||
| 25 | 1.35 | 2.23 | 3.71 | 5.48 | 10.20 | 16.60 | 24.80 | 32.10 | 58.4 | 91.4 | |
| 30 | 1.63 | 2.90 | 4.33 | 6.22 | 11.70 | 19.10 | 28.5 | 51.8 | |||
| 35 | 3.40 | 5.43 | 7.10 | 13.30 | 21.50 | 32.1 | 65.1 | 102.0 | |||
| 40 | 3.90 | 6.20 | 8.83 | 14.80 | 24.10 | 35.7 | 71.6 | 111.6 | |||
| 45 | 6.97 | 10.56 | 16.30 | 26.90 | 39.3 | 78.4 | 123.0 | 179 | |||
| 50 | 7.74 | 11.90 | 19.30 | 30.40 | 43.0 | 91.7 | 143.0 | 209 | |||
| 55 | 11.88 | 27.10 | 35.40 | 54.0 | 111.0 | 164.0 | 239 | ||||
| 60 | 34.30 | 41.20 | 62.9 | 127.0 | 200.0 | 289 | |||||
| 70 | 44.70 | 71.8 | 127.0 | 203.0 | 365 | ||||||
| 80 | 52.20 | 80.7 | 143.0 | 226.0 | 299 | ||||||
| 90 | 57.70 | 89.6 | 159.0 | 253.0 | 365 | ||||||
| 100 | |||||||||||
The DIN 7991 is designed to disappear. The head has a 90-degree tapered angle that sits inside a “countersunk” hole. Once installed, the top of the screw nut bolt is perfectly level with the surface. This is critical for sliding parts, floor plates, and any bolt fastener application where a protruding head would be a safety hazard.
In the salty, humid air of Mumbai, simple zinc plating on a 10.9 grade screw nut bolt will struggle. Once moisture gets into the countersunk pocket, it stays there and causes “Crevice Corrosion.” For long-term projects, a Nut Bolt Supplier Mumbai will always recommend Stainless Steel Fasteners (A4/SS 316) to ensure the flush finish stays rust-free.
This is the most common mistake! Unlike hex bolts where you only measure the shank, for DIN 7991, the length is measured “Overall” (from the top of the head to the end of the threads). Since the head sits inside the material, the total length includes the head thickness. Always clarify this with your Fasteners Supplier India before placing a bulk order.
Yes, but with a “Locking” strategy. Because there is no “shoulder” to create tension, these fasteners screw bolts can sometimes back out. Using a thread-locking compound or a specialized “Ribbed” countersunk washer is the pro move. Sourcing from a top Nut Bolt Supplier ensures the 90-degree angle is precise, which helps the screw nut bolt seat firmly.
We don’t just sell screw nut bolt sets; we sell “Traceability.” Vimal Industrial provides fully certified DIN 7991 stock with all dimensions verified to DIN standards. As a premier Nut Bolt Supplier Mumbai, we ship across India, ensuring your project gets the high-strength, high-finish hardware it deserves.
