S-91375A721 1/2"-13 x 2 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 corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
- Exceptional holding power from Class 3A thread fit, ensuring vibration-resistant fastening in critical applications
- High-strength performance with Rockwell C45 hardness alloy steel, preventing deformation under heavy loads
- Easy installation and removal using the 1/4" hex drive, allowing quick maintenance with standard tools
- Secure component positioning with cup tip design, providing positive contact and preventing slippage
- Reliable coarse threading (UNC 1/2"-13) for faster assembly and reduced cross-threading risks
- Headless design enabling flush mounting where space constraints exist
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical engineering solutions for industrial applications where vibration resistance and corrosion protection are paramount. The Class 3A thread fit maintains precise tolerances in high-stress environments, while the UNC coarse thread configuration enables rapid assembly in production settings. The headless hex drive design allows for seamless integration in confined spaces, making it ideal for machinery components, automotive systems, and precision equipment. The cup tip ensures maximum contact pressure for secure shaft positioning, preventing rotational slippage that compromises assembly integrity. With Rockwell C45 hardness, this fastener withstands repeated torque applications without stripping, providing long-term reliability in demanding industrial applications.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit precision for superior dimensional accuracy. The 1/2"-13 UNC coarse thread pattern ensures compatibility with standard components. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting global manufacturing standards. Manufactured according to ASTM F912 specifications for consistent quality and performance in industrial applications.
