M4*40 12.9 grade hex socket head cap screw

Socket Head Cap Screw M4×40, Grade 12.9

High-strength M4×40 socket head cap screw with a cylindrical head, designed for hobby projects, DIY builds, workshop use, and precision assemblies. Made from durable grade 12.9 steel, it offers excellent strength and reliability wherever a secure, tight fastening is needed.

• Thread size: M4
• Length: 40 mm
• Head type: Cylindrical socket head
• Material grade: 12.9 steel
• Application: Ideal for hobby, mechanical, and technical projects
• Fastening: Allen / hex socket drive for convenient installation

Thanks to its high strength class, this screw is a great choice for demanding applications where standard fasteners may not be enough. It works well in machine components, custom constructions, 3D printer builds, RC models, electronics enclosures, and many other workshop projects.

Package includes:

• 50 x M4 socket head cap screw with cylindrical head, grade 12.9