S-91301A996 1"-12 x 1/2" Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit ensuring precise, vibration-resistant connections in demanding applications
• Exceptional durability from Rockwell C45 hardness, providing reliable performance under high-stress conditions
• Secure installation with 9/16" hex drive allowing for high torque application without stripping
• Enhanced corrosion resistance thanks to black-oxide coating on alloy steel, extending service life in industrial environments
• Fine thread design (1"-12 UNF) delivers better adjustment precision and load distribution compared to coarse threads
• Headless construction enables flush mounting where space constraints or rotating components are concerns
• Regulatory compliance with RoHS 3 and REACH standards ensures environmental safety and global market acceptance

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions where precision alignment and permanent positioning are paramount. The Class 3A thread fit provides tighter tolerances than standard commercial grades, eliminating backlash in precision machinery, automotive components, and manufacturing jigs. The combination of Rockwell C45 hardness and fine UNF threads ensures exceptional resistance to vibrational loosening in high-cycle applications. The headless design with hex drive allows installation in confined spaces while maintaining high clamping force. Black-oxide surface treatment offers superior corrosion protection without dimensional changes, making these set screws ideal for OEM assemblies, industrial equipment, and precision instruments requiring reliable, long-term fastening solutions.

Specification Summary & Compliance

Manufactured to precise UNF 1"-12 fine thread specifications with Class 3A thread fit for superior dimensional accuracy. The alloy steel construction achieves Rockwell C45 hardness for optimal strength-to-weight ratio. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. Right-hand thread orientation and 1/2" length provide standardized installation across compatible applications.