S-91410A954 7/8"-9 x 8" ASME B18.6.2 Set Screws

Key Features & Benefits at a Glance

• Exceptional holding power with Class 2A thread fit for reliable, vibration-resistant fastening in demanding applications
• Superior torque transmission via the square head and external square drive, enabling secure installation with standard tools
• Enhanced material durability from Rockwell B80 hardened steel, providing excellent resistance to wear and deformation
• Optimized for coarse adjustments with UNC coarse threading, allowing for quicker installation and disassembly
• Secure component positioning with the cup tip design, which minimizes surface damage while maintaining a firm grip
• Long-term operational reliability in heavy-duty assemblies, supported by the substantial 8" length for deep seating applications
• Compliance with industry and environmental standards, including ASME B18.6.2, RoHS 3, and REACH, ensuring safety and regulatory acceptance

Professional Applications & Engineering Value

This 7/8"-9 UNC steel set screw is engineered to address critical challenges in industrial machinery, construction, and heavy equipment assembly. The square head design and external square drive provide maximum torque application, reducing the risk of stripping during high-stress installations. Made from hardened steel with Rockwell B80 hardness, it resists shear forces and maintains thread integrity under repetitive loads. The coarse UNC thread and Class 2A fit ensure consistent engagement in materials where fine threads might fail, while the cup tip offers concentrated clamping force without marring surfaces. Ideal for securing gears, pulleys, and collars, this 8-inch set screw delivers long-term performance in environments requiring robust, reliable fastening solutions.

Specification Summary & Compliance

This set screw adheres to ASME B18.6.2 specifications, ensuring dimensional accuracy and mechanical performance. Threads are manufactured to UNC coarse profile with Class 2A tolerance for consistent fit and function. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming the absence of restricted hazardous substances. All measurements are in inch system, with precise thread diameter (0.875") and length (8") as specified.