S-91390A091 M2 x 4 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 using standard 0.9mm hex drive tools for efficient assembly and maintenance operations
• Optimized for industrial use with coarse thread spacing (0.4mm pitch) enabling quick installation and reduced cross-threading risk
• Regulatory compliance meeting DIN 916/ISO 4029 standards for guaranteed dimensional accuracy and performance
• Environmentally responsible construction compliant with RoHS 3 and REACH regulations for safe use across industries

Professional Applications & Engineering Value

This M2 set screw delivers critical engineering value in precision assemblies where space constraints and vibration resistance are paramount. The headless design allows for flush mounting in tight spaces, while the cup point tip creates permanent seating by displacing material for maximum resistance to loosening under dynamic loads. Manufactured from alloy steel with Rockwell C45 hardness, it maintains structural integrity in high-stress applications including machinery components, electronic enclosures, and precision instruments. The metric coarse threads (0.4mm pitch) provide excellent engagement in both metallic and non-metallic materials, making it ideal for production lines requiring rapid assembly without compromising fastening reliability.

Specification Summary & Compliance

This metric set screw features precise M2 x 0.4mm thread dimensions with Class 5g6g thread fit tolerance per ISO standards, ensuring consistent performance across manufacturing applications. Manufacturing specifications strictly adhere to DIN 916/ISO 4029 standards for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for use in regulated industries and international markets.