S-93070A154 M4 x 40 mm DIN 7984 Alloy Steel Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Superior tensile strength of 110,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Exceptional durability from Rockwell C20 hardness and Class 8.8 alloy steel construction, providing excellent resistance to wear and deformation over time.
• Space-saving low profile head with a 7mm diameter and 2.8mm height allows for installation in tight or restricted spaces without compromising on drive engagement.
• Secure and efficient installation using a standard 2.5mm hex key, offering a positive grip that minimizes stripping and enables precise torque application.
• Optimized thread design with a coarse M4 x 0.7mm pitch and Class 6g fit ensures quick assembly, strong holding power, and reduced cross-threading risks.
• Versatile partial threading (14mm thread length on a 40mm screw) provides a firm grip in tapped holes while leaving the unthreaded shank to act as a precision guide or pivot.
• Compliance with international standards including DIN 7984, RoHS 3, and REACH, guaranteeing material safety, environmental responsibility, and consistent quality for global industrial use.

Professional Applications & Engineering Value

This M4 socket head cap screw is engineered to address common challenges in precision machinery, automation systems, and compact assemblies where space constraints and vibration resistance are critical. The low profile socket head design minimizes protrusion, making it ideal for enclosures and moving parts that require a flush finish. Manufactured from Class 8.8 alloy steel, it offers a robust solution for applications demanding high tensile strength and fatigue resistance, such as in motor mounts, conveyor systems, and robotic arms. The coarse metric thread (M4 x 0.7mm) with a Class 6g thread fit ensures rapid installation and reliable performance in dynamic environments, reducing maintenance downtime. Additionally, the partially threaded configuration allows the unthreaded portion to serve as a dowel or alignment feature, enhancing structural integrity in assemblies subject to shear forces.

Specification Summary & Compliance

This screw adheres to precise dimensional and performance standards, including a Class 6g thread fit per ISO metric specifications, ensuring compatibility with standard M4 nuts and tapped holes. It is manufactured in compliance with DIN 7984 for consistent quality and interchangeability. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for use in various industrial and electronic applications. With a right-hand thread direction and coarse thread spacing, it is designed for efficient assembly and disassembly while maintaining high mechanical integrity.