S-91375A578 5/16"-18 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 on alloy steel, extending service life in demanding environments
- Exceptional holding power from Class 3A thread fit precision, preventing loosening under vibration and load
- High-strength durability with Rockwell C45 hardness, maintaining structural integrity under repeated torque
- Secure, flush installation with headless design and cup tip, ideal for permanent positioning without protrusion
- Easy installation and removal using standard 5/32" hex drive tools, reducing assembly time
- Reliable coarse thread engagement with UNC 5/16"-18 specification, suitable for quick fastening in various materials
- Compliance with major industrial standards including ASME B18.3, ensuring consistent quality and safety
Professional Applications & Engineering Value
This 5/16"-18 UNC set screw delivers critical performance in industrial applications where vibration resistance and permanent fastening are paramount. The black-oxide alloy steel construction, combined with Rockwell C45 hardness, provides excellent wear and corrosion resistance, making it ideal for machinery, automotive components, and production equipment. The headless design with cup tip ensures a flush finish, preventing interference in rotating assemblies. With coarse UNC threads and Class 3A thread fit, it offers rapid installation and superior grip in soft metals or plastics, reducing the risk of stripping. The 5/32" hex drive allows for high-torque application, ensuring reliable set screw performance in high-stress environments.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit tolerances for precise engagement, with UNC 5/16"-18 coarse threads and right-hand direction. It meets ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability in industrial use.
