Heavy Duty M3x9mm Hex Socket Head Cap Screws, Grade 12.9 Alloy Steel, Black Oxide Finish, Built Tough for Precision Electronics, 3D Printing, and Tiny Micro Mechanical Projects, 50 Pack

High-Strength M3x9mm Hex Socket Cap Screws, 50-Pack
✔️ Grade 12.9 alloy steel, M3x9 length, black oxide finish

These heavy-duty cap screws are built for precision projects and small electronics assemblies. They're ideal for securing components in 3D printers, micro-machines, and compact robotics where tight, reliable fastenings matter.

✅ Premium Grade 12.9 alloy steel with 1220 N/mm² tensile strength
✅ DIN912 compliance for precise M3x9mm length ±0.24mm tolerance
✅ Anti-rust black oxide finish for corrosion protection
✅ Pack of 50, ±5% tolerance, consistent thread forming
✅ Suitable for electronics mounting, PCB hardware, and micro-machines

💡 What is a hex socket head cap screw used for in small builds?

These handy fasteners provide strong, reliable joints in compact projects. - handy for electronics mounting, 3D printing, drone builds
- DIN912 compatible with standard M3 hardware
- black oxide finish resists corrosion and looks neat