S-91390A220 M4 x 25 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with high-strength alloy steel construction and Rockwell C45 hardness for maximum durability in demanding applications
• Precise thread engagement with Class 5g6g thread fit ensuring reliable fastening and vibration resistance in industrial assemblies
• Space-saving headless design with 2mm hex drive allowing flush installation where clearance is limited
• Enhanced grip performance with cup tip design that creates secure fastening points without damaging components
• Optimized for coarse threading applications with M4 x 0.7mm right-hand metric threads for quick installation and removal
• Full regulatory compliance meeting DIN 916/ISO 4029 standards plus RoHS 3 and REACH environmental regulations
• Consistent dimensional accuracy with 25mm length precision for reliable repeatability in automated assembly processes

Professional Applications & Engineering Value

This alloy steel set screw delivers exceptional engineering value in precision industrial applications where space constraints and vibration resistance are critical concerns. The headless hex drive design with 2mm drive size enables flush mounting in tight spaces while maintaining high torque capability. The M4 coarse thread with 0.7mm pitch provides superior holding strength in softer materials and faster installation compared to fine thread alternatives. The cup tip configuration creates positive engagement points without excessive surface damage, making it ideal for precision machinery, automotive components, and electronic enclosures where repeated adjustments may be necessary. Manufactured to DIN 916/ISO 4029 standards, this fastener ensures interchangeability and reliability across global manufacturing specifications.

Specification Summary & Compliance

This metric set screw features precise M4 x 0.7mm coarse threads with Class 5g6g thread fit tolerance per ISO standards, ensuring consistent performance in industrial applications. The 25mm length provides standardized dimensional accuracy for reliable assembly processes. Manufacturing compliance includes DIN 916 ISO 4029 specifications for dimensional and mechanical properties. Environmental compliance is verified with RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant status, meeting the latest regulatory requirements for industrial components.