S-91410A953 7/8"-9 x 5" ASME B18.6.2 Set Screws

Key Features & Benefits at a Glance

• Exceptional Durability: Made from high-strength steel with Rockwell B80 hardness for superior wear resistance and long service life in demanding industrial environments.
• Secure Fastening: Coarse UNC threads with Class 2A fit ensure reliable engagement and vibration resistance, reducing the risk of loosening under heavy loads.
• Easy Installation & Removal: Square head with external square drive allows for high-torque application using standard tools, speeding up assembly and maintenance.
• Optimized for Heavy-Duty Use: 5" length and 7/8"-9 thread size provide substantial clamping force for large-scale machinery and structural applications.
• Enhanced Grip & Alignment: Cup tip design concentrates pressure on a small contact area, improving grip on shafts and preventing component slippage.
• Regulatory Compliance: Meets ASME B18.6.2 specifications and environmental standards (RoHS 3, REACH) for safe, reliable use in global markets.
• Standardized Design: Inch measurement system and right-hand thread direction ensure compatibility with existing equipment and simplify inventory management.

Professional Applications & Engineering Value

This 7/8"-9 UNC steel set screw is engineered to address critical challenges in heavy machinery, manufacturing, and construction sectors. Its coarse thread spacing and Class 2A thread fit provide excellent resistance to vibration and dynamic loads, preventing unintended disassembly in high-stress environments. The square head design with external drive enables efficient installation even in confined spaces, reducing labor time. The cup tip ensures maximum contact pressure on rotating components like shafts and collars, minimizing wear and maintaining precise alignment. Manufactured from steel with Rockwell B80 hardness, it withstands harsh conditions including corrosion and mechanical stress, making it ideal for industrial equipment, automotive assemblies, and structural frameworks where reliability is paramount.

Specification Summary & Compliance

This set screw features 7/8"-9 UNC coarse threads with Class 2A tolerance for precise fit and consistent performance. It complies with ASME B18.6.2 manufacturing standards, ensuring dimensional accuracy and mechanical integrity. Environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) are fully met, confirming the absence of hazardous substances. Additional specifications include a 5" length, square head (21/32" height, 7/8" width), right-hand thread direction, and cup tip type, providing a reliable solution for industrial fastening needs.