S-91410A639 3/8"-16 x 3 1/2" ASME B18.6.2 Set Screws

Key Features & Benefits at a Glance

• Exceptional holding power with coarse UNC threads for superior grip and resistance to vibration loosening in demanding applications
• High-strength steel construction with Rockwell B80 hardness ensures long-term durability and resistance to wear and deformation
• Secure and efficient installation provided by the external square head design, allowing for high-torque application with standard tools
• Reliable thread engagement guaranteed by the Class 2A thread fit, ensuring consistent performance and ease of assembly
• Enhanced component protection from the cup tip, which minimizes surface damage to the mating part while providing concentrated clamping force
• Broad industrial compatibility with a 3.5-inch length and 3/8"-16 thread size, making it suitable for a wide range of shaft-securing and positioning tasks
• Guaranteed regulatory compliance meeting ASME B18.6.2 specifications, RoHS 3, and REACH, ensuring safety and environmental standards are met for global supply chains

Professional Applications & Engineering Value

This 3/8"-16 UNC set screw is engineered to address critical challenges in industrial fastening, such as component slippage and vibrational loosening. The coarse thread profile and Class 2A fit provide excellent holding strength, making it ideal for securing collars, gears, and pulleys onto shafts in machinery and automotive systems. Manufactured from high-grade steel with a Rockwell B80 hardness, it resists shear forces and maintains clamp load under heavy operational stress. The square head design allows for secure wrenching, preventing tool slip and enabling precise torque application in confined spaces. Its cup tip concentrates force to minimize damage to shaft surfaces, preserving the integrity of expensive components. This screw is a reliable choice for industrial applications requiring durable, compliant fasteners that meet rigorous ASME B18.6.2 standards.

Specification Summary & Compliance

This set screw features a 3/8"-16 UNC coarse thread with a Class 2A thread fit for consistent dimensional accuracy and assembly ease. It complies with the ASME B18.6.2 standard for square head set screws, ensuring reliable performance in mechanical applications. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming it is free from hazardous substances and suitable for use in regulated markets.