S-91385A575 5/16"-18 x 5/16" 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
- Permanent vibration resistance through nylon patch thread locker that maintains locking performance from -50°F to 250°F
- Superior corrosion protection with black-oxide finish on alloy steel, extending service life in demanding environments
- Precise thread engagement with Class 3A fit ensuring consistent clamping force and reduced assembly variation
- Enhanced drive torque capability from Rockwell C45 hardness and 5/32" hex drive design
- Secure component positioning through cup tip design that concentrates pressure for reliable seating
- Space-saving installation with headless configuration ideal for confined spaces and flush mounting
- Industry-standard compatibility with UNC coarse thread pattern for easy replacement and maintenance
Professional Applications & Engineering Value
This 5/16"-18 UNC set screw delivers critical vibration resistance in industrial machinery, automotive components, and precision equipment where loosening under dynamic loads poses safety risks. The nylon patch thread locker provides permanent locking without chemical degradation across extreme temperature ranges (-50°F to 250°F), eliminating maintenance interventions. Manufactured from Rockwell C45 hardened alloy steel with black-oxide surface treatment, it withstands corrosive environments while maintaining Class 3A thread fit precision for consistent clamp load distribution. The cup tip design concentrates contact pressure to prevent component slippage in shaft collars, gears, and coupling applications, making it essential for high-vibration assemblies requiring set-and-forget reliability.
Specification Summary & Compliance
This set screw features 5/16"-18 UNC coarse threads with Class 3A fit tolerance for precision assembly. Manufacturing complies with ASME B18.3 specifications (ASTM F912) and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The component maintains dimensional integrity through Rockwell C45 hardness and includes right-hand thread direction with 5/32" hex drive for standardized installation tools.
