M4*20 12.9 grade semi-round head internal hexagonal screw

Button Head Hex Socket Screw M4×20, Grade 12.9

Looking for strong, reliable screws for hobby builds, repairs, or custom assemblies? This M4×20 button head hex socket screw is a great choice whenever you need a durable fastener with a clean, low-profile finish. Made from Grade 12.9 steel, it offers high strength and dependable performance for demanding projects.

• Thread size: M4
• Length: 20 mm
• Head type: Button head
• Drive type: Internal hex socket
• Material grade: Grade 12.9 steel
• Thread diameter: 4 mm
• Ideal for: hobby projects, DIY builds, mechanical assemblies, and repairs

The rounded button head gives your project a neat appearance, while the internal hex socket makes installation easy with the right Allen key. A practical option for makers, model builders, and anyone who needs compact, high-strength hardware.

Package includes:

• 50 x M4 button head hex socket screws