DIN 7991 Manufacturer • Exporter • Supplier
🌍 DIN 7991 Manufacturer • Exporter • Supplier — Hexagon Socket Countersunk Head Screws
DIPTI METAL INDUSTRIES is a leading DIN 7991 manufacturer, DIN 7991 exporter, and global DIN 7991 supplier of DIN 7991 hexagon socket countersunk head screws, also known internationally as ISO 10642 and UNI 5933 screws.
These precision-engineered fasteners are designed for flush surface mounting in applications requiring high tensile strength, accurate alignment, and a clean finish.
🔹 Product Overview
DIN 7991 / ISO 10642 / UNI 5933 specifies hexagon socket countersunk head cap screws for applications where the screw head must sit flush or below the surface of the assembled parts.
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Head Type: Countersunk (flat) head for flush fit
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Drive Type: Internal hex (Allen key drive)
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Material Options:
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Steel (Grades 8.8, 10.9, 12.9)
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Stainless steel A2 (304) – corrosion-resistant
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Stainless steel A4 (316) – marine-grade
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Surface Finish: Zinc plated, black oxide, natural stainless
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Thread Type: Metric, coarse pitch per DIN/ISO standards
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Typical Size Range: M3 to M20, lengths from 6 mm to 100 mm (longer on request)
🌐 International Standards Equivalents
| Standard Code | Country / Organization | Description |
|---|---|---|
| DIN 7991 | Germany | Hexagon socket countersunk head screws |
| ISO 10642 | International | Countersunk head screws with hexagon socket |
| UNI 5933 | Italy | Hexagon socket countersunk screws (metric) |
📐 Technical Specifications (per DIN 7991)
| Thread Size | Pitch (mm) | Head Dia. (dk) mm | Head Height (k) mm | Socket Width (s) mm |
|---|---|---|---|---|
| M3 | 0.50 | 5.6 – 6.7 | 1.86 – 2.0 | 2.0 |
| M4 | 0.70 | 7.5 – 8.9 | 2.5 – 2.7 | 2.5 |
| M5 | 0.80 | 9.4 – 11.2 | 3.0 – 3.3 | 3.0 |
| M6 | 1.00 | 11.3 – 13.4 | 3.6 – 3.9 | 4.0 |
| M8 | 1.25 | 15.2 – 17.9 | 4.5 – 4.8 | 5.0 |
| M10 | 1.50 | 19.2 – 22.4 | 5.7 – 6.0 | 6.0 |
| M12 | 1.75 | 23.1 – 26.8 | 6.8 – 7.0 | 8.0 |
| M16 | 2.00 | 30.1 – 33.6 | 8.8 – 9.2 | 10.0 |
| M20 | 2.50 | 36.0 – 40.3 | 10.7 – 11.0 | 12.0 |
(Source: DIN 7991 standard dimensions — Pages 2–4)
✅ Key Features & Benefits
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Flush installation for smooth surfaces and aesthetics
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High torque capacity due to internal hex drive
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Precision manufacturing ensures interchangeability per ISO/DIN/UNI
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Available in multiple property classes for strength-critical applications
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Corrosion-resistant options for marine, outdoor, and chemical environments
⚙️ Common Applications
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Aerospace & aviation components
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Automotive body and chassis assembly
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Machinery and equipment manufacturing
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Electronics & enclosures
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Marine and offshore projects
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Structural steel fabrication requiring flush fittings
📦 Sizes & Finishes in Stock
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Diameters: M3, M4, M5, M6, M8, M10, M12, M16, M20
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Lengths: 6 mm – 100 mm (custom lengths available)
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Finishes:
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Zinc plated (clear/blue passivation)
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Black oxide
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Natural stainless steel
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🌍 Global Supply & Export
We supply DIN 7991 screws to Europe, North America, Middle East, Southeast Asia, and Africa, with bulk and small-lot shipments for OEMs, distributors, and project contractors.
Our ISO 9001:2015 certified facilities ensure quality consistency, competitive pricing, and on-time worldwide delivery.
⚠️ Quality & Compliance
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Standards: DIN 7991, ISO 10642, UNI 5933
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Certifications: ISO 9001:2015, RoHS, REACH
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Traceability: Mill test certificates (MTC) available on request
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Grades: Steel 8.8 / 10.9 / 12.9, Stainless A2 / A4
📢 Contact Us
Looking for a reliable DIN 7991 / ISO 10642 / UNI 5933 supplier?
Contact DIPTI METAL INDUSTRIES today for bulk orders, OEM supply contracts, and international shipments.
