S-91390A099 M3 x 5 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with cup point design that bites into materials for secure, vibration-resistant fastening
• Exceptional durability from alloy steel construction with Rockwell C45 hardness for long service life in demanding applications
• Precise thread engagement with Class 5g6g thread fit ensuring reliable performance and consistent clamping force
• Easy installation and removal using standard 1.5mm hex drive tools for efficient maintenance and adjustments
• Reliable coarse threading (0.5mm pitch) that resists loosening under vibration and provides quick assembly
• Space-saving headless design ideal for applications where flush mounting is required
• Global compliance assurance meeting DIN 916/ISO 4029 standards plus RoHS 3 and REACH environmental regulations

Professional Applications & Engineering Value

This M3 metric set screw delivers exceptional engineering value in precision assembly applications where reliable positioning and secure fastening are critical. The alloy steel construction with Rockwell C45 hardness provides the necessary strength to withstand mechanical stresses in industrial machinery, automotive components, and precision equipment. The cup point design creates concentrated pressure that digs into shaft materials, preventing rotational movement and maintaining precise alignment in pulleys, gears, and collars. With its coarse thread pitch and Class 5g6g thread fit, this fastener offers excellent resistance to vibration-induced loosening while ensuring consistent performance across production runs. The headless configuration and hex drive style make it particularly valuable in confined spaces where traditional screw heads would interfere with adjacent components.

Specification Summary & Compliance

This M3 x 0.5mm set screw features precise Class 5g6g thread tolerance according to metric standards, ensuring proper fit and function in threaded applications. Manufacturing specifications strictly adhere to DIN 916 and ISO 4029 standards for dimensional accuracy and performance requirements. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and meets REACH (EC 1907/2006) regulations for chemical safety, making it suitable for global industrial markets and environmentally conscious manufacturing operations.