S-91375A481 7/8"-9 x 1 3/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide finish for extended service life in harsh industrial environments
• Exceptional torque transmission through 1/2" hex drive design, preventing tool slippage during installation
• Precise thread engagement with Class 3A fit ensuring reliable, vibration-resistant fastening in critical assemblies
• Enhanced material strength with Rockwell C45 hardness providing excellent wear resistance and durability
• Secure component positioning through cup point design that creates positive locking action on shafts and axles
• Industry-standard compliance meeting ASME B18.3 specifications for consistent quality and performance
• Environmental responsibility with RoHS 3 and REACH compliance for sustainable manufacturing practices

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional engineering value in demanding industrial applications where vibration resistance and corrosion protection are critical. The 7/8"-9 UNC coarse thread configuration combined with Class 3A thread fit ensures precise engagement and reliable performance in high-stress environments. The headless design with 1/2" hex drive provides maximum torque capability while maintaining a low-profile installation, ideal for machinery components, power transmission systems, and precision equipment where space constraints exist. The cup point tip creates positive locking action on shafts and rotating elements, preventing slippage in heavy-duty applications. Engineered to withstand rigorous operating conditions, these set screws maintain their structural integrity and clamping force even under continuous vibration and dynamic loads.

Specification Summary & Compliance

This high-performance set screw features precise 7/8"-9 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy and engagement. Manufactured to ASME B18.3 specifications with Rockwell C45 hardness rating, ensuring consistent mechanical properties and reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest industry standards for sustainable manufacturing and chemical safety.