100 Pcs Bulk M3 X 16mm Hex Socket Flat Head Cap Screws, Black Oxide Finish, 12.9 Grade Alloy Steel, Countersunk Bolts Kit, 0.5mm Thread Pitch, 3mm Diameter, 14.3mm Thread Length, 5.85mm Head Diameter

Bulk M3x16mm Hex Socket Flat Head Screws, 12.9 Alloy Steel
✔️ M3x16mm hex socket flat head screws, 100 pcs, 12.9 grade

These are bulk M3 x 16mm hex socket flat head cap screws with a black oxide finish and 12.9 grade alloy steel. The kit includes 100 screws and 1 hex key, stored in a plastic case for easy transport and organization. They’re commonly used in electronics enclosures, 3D printer frames, cabinetry, and other assemblies that require a flush, countersunk fastener.

✅ Thread size: M3 (diameter 3 mm)
✅ Total length: 16 mm; thread length 14.3 mm
✅ Head: countersunk flat head, 90° angle
✅ Drive: hex socket drive, 2.0 mm hex size
✅ Material: alloy steel 40Cr, black oxide finish, 12.9 grade
✅ Hardness: HRC 39-44; tensile strength 1220 N/mm²
✅ Pack contents: 100 screws and 1 hex key in plastic storage box

💡 What is the best way to use M3 hex socket flat head screws in electronics and DIY projects?

For clean flush mounting with good grip, these screws work well in tight spaces and lightweight frames.

- Electronics enclosures and 3D printer frames - Furniture and cabinetry with a smooth surface - Robotics and small machinery requiring a strong, flush mount