About Fasto Screws
Serving European, UK, and Global industrial clients with fully compliant DIN 912 (ISO 4762) hex socket screws engineered for high-performance applications.
As a professional fastener supplier serving European & UK industrial clients for years, Fasto DIN 912 screws are fully manufactured to strict DIN 912 (ISO 4762) dimensional standards without GB alternative substitution, perfectly matching assembly requirements for automation, mold, automotive, wind energy and medical equipment across Europe. We focus on engineering integrity, ensuring that every dimension, thread pitch, and material composition meets the exact requirements of international industrial standards.
We offer a complete size range from M1.6 to M64 with lengths 3mm–500mm, covering high-strength carbon steel (8.8 / 10.9 / 12.9) and stainless steel A2-70 (304), A4-80 (316). Multiple surface finishes including black oxide, zinc plating, zinc flake Dacromet and passivation are available to meet corrosion demands for inland machinery, offshore coastal facilities and cleanroom medical equipment. Our advanced manufacturing facility uses state-of-the-art multi-station cold heading machines and precision thread rollers to guarantee structural consistency.
Certified with IATF16949 & ISO9001, our factory adopts full-range testing equipment: spectrometer, high-speed optical sorting machine, salt spray chamber and universal tensile tester. Every batch undergoes raw material PMI verification, in-process inspection, heat treatment hardness monitoring and 100% finished goods sorting, achieving full batch traceability. We supply mill certificates, independent SGS/TÜV test reports, REACH & RoHS compliance documents, PPAP Level 3 and IMDS submission service to satisfy EU & UKCA customs access standards.
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Exclusive services tailored for European buyers: Hot-selling M3-M16 sizes are in stock with 3–7 working days lead time; custom fine thread, non-standard length and private-label packaging are supported. Export-grade cartons & plywood pallets ensure safe ocean & railway transportation. Our professional engineering team provides torque guidance and material selection consultation. Flexible MOQ for trial samples and mass OEM orders, with multiple logistics solutions to guarantee stable on-time delivery, solving all quality, compliance and lead-time concerns for European importers and OEM manufacturers.
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Why Choose Fasto Screws
We align our manufacturing processes and quality controls with international industrial expectations, ensuring reliable performance in critical environments.
1: Automotive Grade
We manufacture under the same quality system that Toyota, VW, and Bosch require from their tier-1 fastener suppliers. Our manufacturing processes enforce strict dimensional tolerances and mechanical property compliance.
2: Full Traceability
Every single batch is fully documented: from the initial raw material mill certificate, production lot records, heat number tracking, inspection reports, to the final shipment. Full chain traceable within 24 hours.
3: EU / US Ready
All materials comply strictly with EU REACH and RoHS environmental regulations. PPAP Level 3 documentation is available upon request. Third-party testing by independent bodies like SGS or TÜV is standard and fully accepted.
Technical Specifications
Comprehensive technical data for DIN 912 Hexagon Socket Head Cap Screws. We produce to precise tolerances using high-grade materials and advanced surface finishes.
1 — Dimensional Range Overview
| Parameter | Range / Standard Value |
|---|---|
| Diameter | M1.6 – M64 |
| Length | 3mm – 500mm |
| Thread Type | Metric coarse (standard) / fine (available on request) |
| Head Type | Hexagon socket (cylindrical head) |
| Drive | Internal hex (Allen key drive system) |
2 — Material & Grade Matrix
| Material Class | Property Grade | Tensile Strength (Min) | Hardness Range | Surface Finish Options |
|---|---|---|---|---|
| Carbon Steel | Grade 8.8 | 800 MPa min | HRC 22-32 | Black oxide / Zinc plated / Zinc flake |
| Carbon Steel | Grade 10.9 | 1040 MPa min | HRC 32-39 | Black oxide / Zinc flake / Dacromet |
| Carbon Steel | Grade 12.9 | 1220 MPa min | HRC 39-44 | Black oxide / Zinc flake / Dacromet |
| Stainless A2 (304) | A2-70 | 700 MPa min | — | Passivated / Plain finish |
| Stainless A4 (316) | A4-70 / A4-80 | 700-800 MPa min | — | Passivated / Plain finish |
| Alloy Steel | 10.9 / 12.9 | Custom spec | Custom spec | Custom tailored finishes |
3 — Surface Treatment & Corrosion Resistance Options
| Finish Type | Corrosion Resistance (Salt Spray Test) | Common Application Environments |
|---|---|---|
| Zinc Plated (Blue/White/Yellow) | Moderate (72-120 hours SST) | General machinery, indoor equipment, dry environments |
| Black Oxide + Oil | Low corrosion protection | Internal engine components, oil-immersed machinery, aesthetics |
| Zinc Flake (Geomet/Dacromet) | High (480-1000 hours SST) | Automotive chassis, wind energy turbines, outdoor structures |
| Hot-Dip Galvanized | Very High protection | Heavy construction, outdoor infrastructure, marine installations |
| Passivated (Stainless Steel) | Excellent inherent resistance | Food processing, medical hardware, chemical & marine industries |
4 — Dimensional Tolerances (DIN 912 / ISO 4762)
| Dimension Parameter | Tolerance Class & Standard compliance |
|---|---|
| Diameter d (thread) | 6g tolerance class per ISO 965-1 standard |
| Head diameter dk | Manufactured precisely according to DIN 912 limits |
| Socket depth t | Manufactured precisely according to DIN 912 limits |
| Head height k | Manufactured precisely according to DIN 912 limits |
| Thread length b | Manufactured precisely according to DIN 912 limits |
Every single dimensional property is verified using our advanced optical measurement systems. Full inspection reports and dimensional certificates are generated and packed with each shipment to guarantee zero defect installation.
Quality Assurance System
Our comprehensive multi-stage inspection flow ensures that every hex socket cap screw meets the mechanical and dimensional standards required for industrial application.
QC Process (Horizontal Flow)
Inspiration Process Flow
Visual mapping of our cold heading, thread rolling, heat treatment, and quality checkpoint locations across the manufacturing line.
Inspection Instruments
Equipped with tensile testers, salt spray chambers, hardness testers, and spectrometers to ensure structural integrity and chemical composition.
Third-Party Testing Support
We don't just claim quality — we invite independent verification. Third-party testing by SGS, TÜV, or Bureau Veritas is standard for us. We regularly submit samples for metallurgical testing, mechanical load verification, and chemical composition checks to guarantee full compliance with your contract specifications.
Industrial Applications
Fasto DIN 912 hexagon socket head cap screws are widely used in critical industrial environments where safety, high tensile strength, and durability are required.
Automotive Industry
Powertrain, chassis components, and interior assemblies requiring high-strength fasteners with full batch traceability and IATF 16949 standards.
Industrial Machinery
CNC machines, robotics, heavy conveyors, and automated assembly systems where vibration resistance and reliable joint clamping force are critical.
Mold & Die
High-pressure injection molds, stamping dies, and heavy tooling components requiring precise clamping force and resistance to cyclic mechanical fatigue.
Medical Devices
Surgical equipment, imaging hardware, and diagnostic systems. We supply passivated A4 (316) stainless steel screws packaged for cleanroom installations.
Renewable Energy
Wind turbine nacelles, solar tracking systems, and marine energy installations. Corrosion-resistant coatings like Geomet ensure long-term outdoor reliability.
General Engineering
Construction hardware, agricultural equipment, and heavy infrastructure projects requiring high-volume supply and consistent structural quality.
Packing & Logistics Solutions
Export-grade packaging and flexible global shipping methods to ensure your industrial fasteners arrive safely and on schedule.
To prevent thread damage and surface abrasion during transit, Fasto utilizes heavy-duty, double-walled corrugated cartons stacked on fumigated plywood pallets. We apply protective plastic wrapping and metal banding to secure the cargo against moisture and shifting during long-distance maritime and railway transport.
We offer custom packaging layouts to integrate into your automated warehousing systems, including customized carton dimensions, barcode labeling, QR code scanning, and custom retail or industrial box branding.
- Standard Packaging: 25 kg per carton, 36 cartons per pallet, wrapped in protective stretch film.
- Custom Labeling: OEM private labeling, barcodes, batch numbers, and material certifications attached.
- Flexible Freight: Support for Ocean, Railway (China-Europe Express), Air Freight, and Express (DHL/FedEx/UPS).
- Customs Clearance: Full documentation compliance for European (CE/UKCA) and North American ports.
Frequently Asked Questions
Find quick answers to common questions about our DIN 912 hex socket screws manufacturing, MOQ, certifications, and delivery options.