S-91375A559 1/4"-28 x 1/2" 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 corrosion resistance with black-oxide coating, extending service life in harsh industrial environments.
- Precise thread engagement with Class 3A fit and UNF fine threads, ensuring reliable, vibration-resistant connections.
- High mechanical strength from alloy steel and Rockwell C45 hardness, ideal for heavy-duty applications.
- Secure, flush mounting with headless design and cup point tip, preventing component slippage and damage.
- Easy installation and removal using a standard 1/8" hex drive, reducing assembly time and tool wear.
- Compliance with major industry standards including ASME B18.3 and ASTM F912, guaranteeing quality and interoperability.
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address critical challenges in precision machinery, automotive assemblies, and industrial equipment. The UNF fine thread with Class 3A fit provides exceptional clamping force and vibration resistance, minimizing loosening under dynamic loads. The cup point tip bites securely into shafts and collars, preventing rotational slip in high-torque applications. Made from hardened alloy steel with a Rockwell C45 rating, it withstands repetitive stress and harsh conditions, reducing maintenance frequency and downtime. Ideal for securing gears, pulleys, and bearings, this hex drive set screw delivers reliable performance in demanding engineering environments.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit for high precision and features 1/4"-28 UNF fine threads with right-hand direction. It meets ASME B18.3 and ASTM F912 specifications for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safe and environmentally conscious usage.
