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alloy steel 129 hexagon socket head cap screw din 912 for precision machinery and tooling-0

Bolt

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Alloy Steel 12.9 Hexagon Socket Head Cap Screw DIN 912 for Precision Machinery and Tooling

Ultra-High Tensile Strength | Precision Internal Hex Drive for High-Torque Assembly

  • Overview
  • Key Features
  • Technical Specifications
  • Materials & Surface Finish
  • Applications
  • Customization Options
  • Company Strengths (Pyramid Hardware Fasteners)
  • Packing & Logistics
  • FAQ
  • Recommended Products

The Pyramid Hardware Hexagon Socket Head Cap Screw (DIN 912) is the gold standard for high-performance mechanical assembly. Designed for machine tool builders, automotive engineers, and precision equipment manufacturers, these screws offer superior tensile strength and space-saving advantages over traditional hex bolts. Manufactured from high-grade alloy steel (Class 12.9) or stainless steel, our DIN 912 screws feature a cylindrical head with an internal hexagonal drive, allowing for high torque application using an Allen key or hex bit. Based in Egypt, Pyramid Hardware utilizes multi-station cold-heading and precision thread-rolling to ensure every screw meets the exacting tolerances of ISO 4762.

Key Features

Grade 12.9 Performance:

  • Made from quenched and tempered alloy steel, providing a tensile strength of up to 1220 MPa for the most demanding structural applications.

Space-Efficient Design:

  • The compact cylindrical head allows for countersunk installation, making them ideal for tight spaces where a traditional wrench cannot reach.

High Torque Capability:

  • The internal hex drive resists cam-out and allows for significantly higher tightening torques compared to slotted or cross-recess drives.

Precision Threading:

  • Rolled threads (Class 6g) provide superior fatigue resistance and smooth installation into tapped holes.

Wide Size Range (M3-M48):

  • From delicate electronic assembly screws to massive industrial foundation bolts.

Technical Specifications

Parameter

Details

Standard

DIN 912 / ISO 4762

Diameter Range

M3 to M48

Length

5mm to 400mm

Property Class

Alloy Steel 8.8, 10.9, 12.9; Stainless A2/A4

Drive Type

Internal Hexagon (Socket)

Thread Coverage

Full thread or Partial thread (standard per length)

Materials & Surface Finish

Alloy Steel (SCM435 or similar):

  • Heat-treated to Class 10.9 or 12.9 for maximum hardness and strength.

Stainless Steel (A2-70, A4-80):

  • For corrosion-resistant precision assembly.

Surface Finishes:

Black Oxide:

  • The industry standard for alloy steel, providing a sleek look and moderate rust protection.

Zinc Plating (Clear/Yellow):

  • For enhanced atmospheric corrosion resistance.

Geomet/Dacromet:

  • High-performance coatings for automotive and outdoor machinery.

Applications

Machine Tooling:

1. Securing dies, jigs, and fixtures in manufacturing centers.

Automotive Engineering:

2. Engine components, transmission housings, and suspension mounts.

Robotics & Automation:

3. Precision assembly of arms and sensors where space is limited.

Injection Molding:

4. High-pressure assembly of mold plates and frames.

Aerospace & Defense:

5. Structural fasteners for ground support equipment and airframes.

Heavy Machinery:

6. Earthmoving equipment and mining machinery assembly.

Customization Options

Feature

Available Customization

Nylok Patch

Pre-applied thread-locking patches to prevent loosening from vibration

Low Profile Head

Ultra-low head versions (DIN 7984) for extreme clearance issues

Custom Shank Lengths

Specific unthreaded portions for precision alignment pins

Vented Screws

Hollow-core screws for vacuum or high-pressure relief applications

Company Strengths (Pyramid Hardware Fasteners)

Egypt's Leader:

  • 15+ years experience in high-tensile fastener manufacturing.

Global Certification:

  • ISO 9001:2015 and IATF 16949 certified.

Advanced Equipment:

  • 50+ machines including multi-station cold headers.

Fast Logistics:

  • Strategic export from Alexandria/Port Said to 30+ countries.

Reliability:

  • 98.5% On-Time Delivery (OTD).

Factory-Direct:

  • 15-30% savings over traditional supply chains.

Packing & Logistics

Ports:

  • Alexandria, Port Said, Damietta.

Incoterms:

  • FOB, CIF, CFR.

Packaging:

  • Small boxes (100-500 pcs) inside master cartons on pallets.

FAQ

What is the difference between Grade 10.9 and 12.9?

1. Grade 12.9 offers higher tensile strength and hardness but is more susceptible to hydrogen embrittlement if not coated properly.

Do you offer DIN 912 in Stainless Steel?

2. Yes, we carry A2 and A4 stainless steel for food and marine applications.

What is the MOQ?

3. Standard sizes: 500-1000 pieces. Special runs may require higher quantities.

Can you provide a certificate of compliance?

4. Yes, all shipments come with a quality certificate and material analysis.

How long for a custom length order?

5. Typically 15-25 working days for bulk production.

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