S-91390A691 M20 x 60 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Exceptional holding power with cup point design that bites securely into mating surfaces, preventing component slippage under vibration
• Superior thread precision with Class 5g6g tolerance ensuring consistent fit and reliable performance in demanding applications
• Enhanced durability through Rockwell C45 hardened alloy steel construction, resisting wear and deformation under high stress
• Optimized torque transmission via 10mm hex drive, allowing for secure installation with standard tools while preventing stripping
• Fine-pitch threading advantage with M20x1.5 extra fine spacing providing superior adjustment precision and vibration resistance
• Regulatory compliance assurance meeting DIN 916/ISO 4029 standards plus RoHS 3 and REACH environmental directives
• Space-saving headless design enabling flush mounting in confined assemblies while maintaining full fastening strength

Professional Applications & Engineering Value

This M20 set screw delivers critical engineering solutions where precision alignment and vibration resistance are paramount. The alloy steel composition, hardened to Rockwell C45, maintains structural integrity under repetitive stress cycles common in industrial machinery and automotive assemblies. The extra fine metric thread with 1.5mm pitch provides micro-adjustment capability essential for precision equipment calibration, while the cup point creates permanent seating impressions that resist loosening in high-vibration environments. The headless design with hex drive accommodates space-constrained applications in motor mounts, gear systems, and precision tooling where traditional fastener heads would interfere. Manufactured to DIN 916/ISO 4029 specifications, this set screw ensures dimensional consistency across global production facilities and maintenance operations.

Specification Summary & Compliance

This precision fastener features Class 5g6g thread fit per metric standards, ensuring tight tolerance control for reliable engagement. The M20x1.5 extra fine thread configuration provides superior holding characteristics compared to standard pitches. Manufacturing compliance includes DIN 916 where identical to ISO 4029 for dimensional consistency, along with full conformity to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The 60mm length and 10mm hex drive accommodate standard installation tools while maintaining the structural benefits of hardened alloy steel construction.