S-91375A736 1/2"-20 x 1 1/4" ASME B18.3, ASTM F912 Set Screws
Set Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior holding power with Class 3A thread fit for precise, vibration-resistant fastening in critical assemblies
- Exceptional durability from Rockwell C45 hardness, maintaining performance under heavy loads and repeated use
- Secure and efficient installation via 1/4" hex drive, allowing high torque application without stripping
- Enhanced grip and minimal surface damage with cup point tip design, ideal for permanent positioning on shafts and components
- Reliable fine thread engagement with 1/2"-20 UNF threads, providing superior resistance to loosening in dynamic environments
- Long-term corrosion and wear resistance from high-grade alloy steel construction
- Broad industrial compliance meeting ASME B18.3, ASTM F912, RoHS 3, and REACH for safe, regulated use
Professional Applications & Engineering Value
This alloy steel set screw is engineered to address common industrial challenges such as component slippage, vibration-induced loosening, and assembly wear. The Class 3A thread fit ensures tight tolerances and reliable engagement in precision machinery, automotive systems, and heavy-duty equipment. The cup point tip concentrates pressure for a firm grip on shafts, pulleys, and gears, minimizing damage to expensive components. With Rockwell C45 hardness and fine UNF threads, it delivers consistent performance in high-stress applications, reducing maintenance needs and downtime. Its headless, hex drive design allows flush mounting and easy access in confined spaces, making it a versatile solution for OEMs and maintenance teams requiring durable, compliant fasteners.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit per UNF standards, ensuring precise dimensional accuracy and interchangeability. Manufactured in compliance with ASME B18.3 and ASTM F912 specifications, it guarantees consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for use across global markets.
