uxcell M3 x 12mm Hex Socket Button Head Cap Screws – Alloy Steel, Black

These M3 x 12mm hex socket button head cap screws from uxcell are a durable, all-purpose fastener for projects that demand strength in a compact size. Made from high-grade alloy steel with a black oxide finish, they offer excellent wear resistance and corrosion resistance, making them ideal for mechanical assemblies, 3D printing, electronics enclosures, and general DIY work.

Each screw features a low-profile button head and an internal hex drive for clean appearance and reliable torque transmission. Fully threaded metric shafts provide strong holding power in metal, plastic, and wood when used with the appropriate tapped holes or nuts.

Key Features

• M3 x 12mm metric size — 3 mm thread diameter with 12 mm length under the head.
• Hex socket button head — low-profile rounded head with 2 mm internal hex drive.
• High-strength alloy steel — performance grade 12.9 for excellent tensile strength.
• Black oxide finish — wear-resistant and corrosion-resistant surface.
• Fully threaded — consistent grip and easy length trimming if needed.

Specifications

• Product Type: Hex socket button head cap screw
• Thread Size: M3 x 12mm
• Thread Pitch: 0.5 mm
• Head Diameter: approx. 5.5 mm
• Head Thickness: approx. 1.5 mm
• Hex Width (Across Flats): 2 mm
• Material: Alloy steel
• Finish: Black oxide
• Strength Grade: 12.9
• Color: Black
• Quantity: 50 or 100  pieces per pack

Typical Applications

• 3D printer builds and upgrades
• Electronics and hobby projects
• Mechanical equipment and robotics
• General household repairs and DIY
• Hardware, brackets, and enclosures

What’s Included

• 50 or 100 × uxcell M3 x 12mm hex socket button head cap screws