S-91416A130 1/4"-20 x 1 1/4" ASME B18.6.2 Set Screws

Key Features & Benefits at a Glance

• Superior torque transmission with square head and external square drive design for secure fastening in high-vibration applications
• Exceptional holding power provided by alloy steel construction with Rockwell C45 hardness for reliable performance under heavy loads
• Optimized thread engagement with 1/4"-20 UNC coarse thread and Class 2A fit ensuring consistent installation and vibration resistance
• Enhanced component positioning through cup tip design that minimizes surface damage while maintaining secure contact
• Industry-standard compliance with ASME B18.6.2 specifications for dimensional accuracy and mechanical properties
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industrial environments
• Right-hand thread orientation for standard installation procedures and compatibility with common assembly tools

Professional Applications & Engineering Value

This alloy steel set screw delivers critical engineering solutions for industrial applications requiring secure component positioning and vibration resistance. The 1/4"-20 UNC coarse thread with Class 2A fit provides reliable engagement in machinery, automotive assemblies, and power transmission equipment where loosening under dynamic loads is a concern. The square head design with external drive enables high torque application without cam-out, while the cup tip concentrates clamping force without damaging shaft surfaces. Manufactured to Rockwell C45 hardness, this fastener maintains its mechanical properties in demanding environments, making it ideal for permanent installations in pulleys, gears, and collars where disassembly is infrequent.

Specification Summary & Compliance

This set screw features precise 1/4"-20 UNC coarse threads with Class 2A tolerance for consistent fit and reliable performance. The fastener meets ASME B18.6.2 dimensional and mechanical specifications, ensuring interchangeability and quality assurance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming restricted substance compliance for industrial applications. The combination of alloy steel material, proper heat treatment, and standardized manufacturing processes delivers a reliable mechanical fastener solution for critical assembly requirements.