S-91375A303 12-28 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
- Exceptional holding strength with Class 3A thread fit for secure, vibration-resistant fastening in demanding applications
- Superior corrosion resistance thanks to the black-oxide finish on alloy steel, extending service life in harsh environments
- High durability and wear resistance from Rockwell C45 hardness, ensuring reliable performance under heavy loads
- Enhanced grip and minimal surface damage with the cup tip design, providing excellent clamping without marring components
- Easy installation and removal using the 3/32" hex drive, compatible with standard tools for efficient maintenance
- Precise fine threading (12-28 UNF) for tighter engagement and improved load distribution in critical assemblies
- Space-saving headless design ideal for confined spaces where protruding fasteners are not feasible
Professional Applications & Engineering Value
This 12-28 UNF Class 3A set screw is engineered to address common industrial challenges such as component slippage and loosening under vibration. Constructed from black-oxide alloy steel, it offers robust resistance to corrosion and wear, making it suitable for machinery, automotive, and aerospace applications where reliability is paramount. The fine thread and cup tip design ensure maximum contact and clamping force, preventing movement in precision assemblies. Its headless profile and right-hand thread facilitate easy integration into tight spaces, while the hex drive allows for quick installation with standard tools, reducing downtime in production environments.
Specification Summary & Compliance
This set screw adheres to ASME B18.3 specifications, ensuring dimensional accuracy and Class 3A thread fit for superior tolerance control. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material integrity. The product meets industry standards for inch-based measurements, including a precise 1/2" length and 3/32" hex drive, supporting consistent performance in regulated engineering applications.
