S-91390A113 M4 x 8 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Rockwell C45 hardness alloy steel construction, resisting wear and deformation in demanding applications.
• Secure and tamper-resistant fastening thanks to the headless hex drive design, ideal for confined spaces and flush mounting.
• Reliable coarse thread engagement (M4 x 0.7mm) for faster assembly and reduced cross-threading risk in various materials.
• Optimized point contact and minimal surface damage from the cup tip, ensuring a firm grip on the shaft or component.
• Precision-engineered thread fit (Class 5g6g) guarantees consistent performance and meets rigorous DIN 916 / ISO 4029 standards.
• Broad industrial compatibility with RoHS 3 and REACH compliance, making it safe for use in regulated environments and global supply chains.
• Compact 8mm length provides versatile application in space-constrained assemblies without compromising on strength.

Professional Applications & Engineering Value

This M4 set screw is engineered to solve critical challenges in industrial assembly and precision machinery. The alloy steel material, hardened to Rockwell C45, delivers exceptional shear and tensile strength, preventing failure under high vibrational loads. The headless hex drive and cup tip design allow for secure, flush installation in pulleys, gears, and collars, minimizing protrusion and maximizing space efficiency. Its right-hand coarse threads ensure quick, reliable seating in both soft and hard materials, reducing installation time and the risk of stripping. Ideal for shaft fixation and component alignment, this screw provides lasting holding power in automotive, aerospace, and manufacturing equipment, where metric thread standards and regulatory compliance are paramount.

Specification Summary & Compliance

This set screw adheres to precise dimensional and performance criteria, including a Class 5g6g thread fit per ISO 4029 and DIN 916 standards, ensuring tight tolerances for reliable fastening. The manufacturing process complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and safety-regulated industrial applications.