S-91418A712 1/2"-13 x 1" ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments.
• High-strength durability from alloy steel with Rockwell C45 hardness, ensuring reliable performance under heavy loads.
• Precise and secure fastening with Class 2A thread fit, reducing the risk of loosening in vibration-prone applications.
• Easy installation and removal thanks to the external square drive and square head design, compatible with standard tools.
• Enhanced grip and positioning with the extended tip and coarse UNC thread, providing superior holding power.
• Strict dimensional accuracy with controlled tip length and diameter tolerances, ensuring consistent assembly quality.
• Compliance with major industry standards including ASTM F912, RoHS 3, and REACH, guaranteeing safety and regulatory adherence.

Professional Applications & Engineering Value

This 1/2"-13 UNC square head set screw is engineered to address critical challenges in heavy machinery, automotive, and construction assemblies. The black-oxide alloy steel construction offers excellent resistance to rust and wear, while the Rockwell C45 hardness ensures it withstands high stress without deformation. The coarse UNC thread and extended tip design provide superior clamping force and alignment in components subject to vibration, reducing maintenance needs. Its external square drive allows for efficient torque application, speeding up installation in tight spaces. Ideal for securing gears, pulleys, and other rotating parts, this screw delivers long-term reliability and performance in industrial fastening applications.

Specification Summary & Compliance

This set screw features a Class 2A thread fit per UNC standards, ensuring precise dimensional accuracy and interchangeability. Key specifications include a 1" length, 1/2"-13 thread size, and controlled tolerances for tip length (-0.005" to 0.005") and diameter (-0.009" to 0"). It is manufactured in compliance with ASTM F912 and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for global industrial use without hazardous substances.