S-91416A120 1/4"-20 x 3/4" ASME B18.6.2 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Rockwell C45 hardness alloy steel construction, ensuring excellent resistance to wear and deformation in demanding applications
• Reliable, vibration-resistant fastening thanks to the Class 2A coarse UNC thread, which provides easier assembly and reduced risk of cross-threading
• Secure, high-torque installation enabled by the external square drive and square head, allowing for a positive grip with standard tools
• Enhanced component positioning with the cup tip design, which minimizes surface damage and provides consistent, firm contact
• Long-term durability and corrosion resistance from the high-strength alloy steel material, suitable for harsh industrial environments
• Broad compatibility and interchangeability due to compliance with ASME B18.6.2 specifications, ensuring consistent performance and fit
• Environmentally responsible manufacturing with adherence to RoHS 3 and REACH standards, supporting sustainable procurement practices

Professional Applications & Engineering Value

This 1/4"-20 UNC alloy steel set screw is engineered to address critical challenges in industrial assembly, where vibration resistance and long-term holding strength are paramount. The coarse thread spacing and Class 2A thread fit facilitate quick, reliable installation in machinery, automotive components, and heavy equipment, reducing assembly time and preventing loosening under dynamic loads. Made from alloy steel with a Rockwell C45 hardness, it withstands high-stress applications without compromising integrity. The external square drive and cup tip ensure secure fastening and minimal marring of contacted surfaces, making it ideal for precision adjustments and permanent positioning in set screw applications across manufacturing, construction, and maintenance sectors.

Specification Summary & Compliance

This set screw features a 1/4"-20 UNC thread with Class 2A thread fit and coarse thread spacing, ensuring dimensional accuracy and ease of use. It complies with the ASME B18.6.2 standard for set screws, guaranteeing consistent manufacturing quality. Additionally, the product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for hazardous substances.