S-92505A545 1/4"-20 x 1 1/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit ensuring tight, reliable connections in demanding applications
• Exceptional durability from Rockwell C45 hardened alloy steel, providing excellent resistance to wear and deformation
• Enhanced corrosion resistance with black oxide surface treatment, extending service life in various industrial environments
• Secure installation and removal through hex drive design, allowing for high torque application without slippage
• Improved grip and positioning with extended tip design, creating deeper engagement and preventing component movement
• Wide compatibility with UNC coarse threading and 1/4"-20 size, making it suitable for standard industrial equipment
• Regulatory compliance assurance meeting ASME B18.3 specifications for consistent quality and performance

Professional Applications & Engineering Value

This black oxide alloy steel set screw delivers critical engineering solutions for industrial applications requiring permanent component positioning. The extended tip design penetrates deeper into mating surfaces, preventing shaft slippage in pulleys, gears, and collars. With Rockwell C45 hardness, it maintains structural integrity under high vibrational loads, while the Class 3A UNC thread fit ensures precise engagement without cross-threading issues. The hex headless configuration allows for flush mounting in space-constrained assemblies, making it ideal for machinery, automotive, and manufacturing equipment where reliability is paramount. The coarse thread spacing provides faster installation and superior resistance to loosening in high-stress environments.

Specification Summary & Compliance

This 1/4"-20 UNC set screw features precise Class 3A thread fit tolerances with coarse thread spacing for optimal engagement. Manufacturing complies with ASME B18.3 specifications (ASTM F912) ensuring dimensional accuracy and performance consistency. The extended tip maintains tight dimensional control with tip length tolerance of -0.005" to 0" and tip diameter tolerance of -0.007" to 0". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications.