S-91416A115 1/4"-20 x 5/8" ASME B18.6.2 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with coarse UNC thread spacing that resists loosening under vibration and heavy loads
• Exceptional durability provided by alloy steel construction with Rockwell C45 hardness for long service life
• Precise installation control through external square drive design that prevents cam-out and ensures proper torque application
• Secure fastening engagement with cup tip design that creates positive contact points on shaft surfaces
• Reliable thread compatibility with Class 2A thread fit ensuring consistent performance in industrial assemblies
• Regulatory compliance assurance meeting ASME B18.6.2 specifications and environmental standards including RoHS 3 and REACH
• Optimized for inch-system applications with 1/4"-20 thread size and 5/8" length for standard industrial equipment

Professional Applications & Engineering Value

This alloy steel set screw with Rockwell C45 hardness delivers critical engineering solutions for demanding industrial environments. The 1/4"-20 UNC coarse thread configuration provides superior resistance to vibrational loosening in machinery, power transmission systems, and rotating assemblies. The external square drive design enables high-torque installation without stripping, while the cup tip creates concentrated pressure points for secure shaft positioning. Manufactured to ASME B18.6.2 standards, this set screw ensures dimensional consistency and reliable performance in automotive, manufacturing, and heavy equipment applications where precision fastening is essential for operational safety and equipment longevity.

Specification Summary & Compliance

This 1/4"-20 UNC set screw features Class 2A thread fit tolerance for consistent assembly performance. The fastener meets ASME B18.6.2 manufacturing specifications ensuring dimensional accuracy and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the product's suitability for regulated industrial applications. The alloy steel construction with Rockwell C45 hardness provides the specified mechanical strength required for secure fastening in critical assemblies.