S-91381A580 5/16"-18 x 5/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating on alloy steel, extending service life in harsh industrial environments
• Exceptional holding power achieved through Class 3A thread fit precision, ensuring vibration-resistant fastening in critical assemblies
• Surface protection technology with soft brass tip that prevents damage to mating components while maintaining secure contact
• Optimized installation efficiency with 5/32" hex drive design, allowing high-torque application in confined spaces
• Enhanced durability from Rockwell C28 hardness rating, providing reliable performance under repeated stress conditions
• Broad compatibility with 5/16"-18 UNC coarse threads, facilitating quick assembly across various industrial applications
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations for global supply chain integration

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions for industrial equipment maintenance and precision assembly. The 5/16"-18 UNC coarse threads with Class 3A fit provide exceptional resistance to vibrational loosening in machinery, automotive, and manufacturing applications. The innovative soft brass tip (0.188" diameter) eliminates surface marring on shafts and rotating components while maintaining superior clamping force. The headless design with hex drive enables flush mounting in space-constrained assemblies, making it ideal for precision alignment applications where protrusions are unacceptable. Engineered for industrial set screws requirements, this component ensures reliable performance in high-stress environments while meeting stringent quality standards.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 specifications with Class 3A thread fit precision for superior dimensional accuracy. The 5/16"-18 UNC coarse thread configuration ensures reliable engagement across industrial applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, with material hardness certified at Rockwell C28 for consistent mechanical performance. The right-hand thread direction and headless hex drive design conform to industry-standard installation practices.