S-91375A807 5/8"-11 x 3 1/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, extending service life in demanding industrial environments
• Superior thread engagement with Class 3A fit ensures precise, vibration-resistant fastening in critical assemblies
• High-strength alloy steel construction with Rockwell C45 hardness provides reliable performance under heavy loads
• Optimized installation efficiency through 5/16" hex drive design, allowing high torque application without head interference
• Secure component positioning with cup tip design that creates positive locking action on shafts and collars
• Industry-standard compatibility with 5/8"-11 UNC coarse threads for easy replacement and broad application use
• Reduced maintenance requirements through durable construction that withstands repeated adjustments without degradation

Professional Applications & Engineering Value

This high-performance set screw delivers critical engineering solutions for industrial applications where vibration resistance and positioning accuracy are paramount. The black-oxide alloy steel construction combined with Rockwell C45 hardness ensures exceptional durability in machinery, automotive, and manufacturing equipment. The Class 3A thread fit provides superior tolerance control, eliminating play in precision assemblies while the UNC coarse threads facilitate quick installation in high-volume production environments. The headless design with hex drive allows flush mounting in confined spaces, making it ideal for securing collars, gears, and pulleys where protruding fasteners are impractical. The cup tip configuration creates concentrated pressure points that prevent slippage on rotating components, solving common alignment issues in power transmission systems.

Specification Summary & Compliance

This set screw maintains precision Class 3A thread fit with 5/8"-11 UNC coarse thread specification, ensuring exacting dimensional accuracy. Manufactured in compliance with ASME B18.3 standards where applicable per ASTM F912, guaranteeing consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant regarding SVHC substances as of January 17, 2023, meeting international environmental and safety regulations for industrial use.