180Pcs M3 By 30mm Hex Socket Head Cap Screws 12.9 Grade Alloy Steel Black Oxide Allen Drive Full Thread With Spanner

M3 x 30mm Hex Socket Screws, 12.9 Steel with Black Finish
✔️ 12.9 steel, black oxide, full-thread, hex drive 2.58mm

These M3 socket head cap screws provide high-strength fastening for compact assemblies. Made from 12.9-grade alloy steel with a durable black oxide coating, they resist corrosion and wear in demanding setups such as 3D printers, RC cars, electronics enclosures, and DIY projects. They’re a solid choice for bearing mounting, linear slide unit assemblies, and other precision hardware tasks.

✅ Thread Diameter: 3mm
✅ Thread Pitch: 0.5mm
✅ Thread Length: 30mm
✅ Head Diameter: 5.5mm; Head Height: 3mm
✅ Drive Type: Allen Hex Socket; Drive Size: 2.58mm
✅ Material & Finish: 12.9 grade alloy steel with black oxide
✅ Pack: 180 pieces + 1 hex spanner

💡 What is a handy question about M3 hex socket head cap screws and why should you care?
They are small, strong fasteners for tight spaces in DIY projects.
- Handy for compact fastening in 3D printers
- 12.9 grade steel offers high strength and corrosion resistance
- Full-thread design provides secure grip and easy adjustment