S-91677A114 5/16"-18 x 3/4" 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 that protects against rust in demanding industrial environments
- Exceptional holding power from Rockwell C32 hardness alloy steel construction that maintains clamp force under vibration
- Precise thread engagement with Class 2A UNC coarse threads ensuring reliable installation and consistent performance
- Enhanced grip and alignment thanks to the ball tip design that reduces component damage during installation
- Space-saving headless design allowing for flush mounting in confined spaces and rotating assemblies
- Easy installation and removal with standard 5/32" hex drive that accommodates common industrial tools
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers exceptional engineering value in demanding industrial applications where vibration resistance and corrosion protection are critical. The 5/16"-18 UNC coarse thread configuration provides superior holding strength in soft materials and faster installation times, while the ball tip design minimizes damage to shaft surfaces during positioning. The headless construction makes it ideal for securing collars, gears, and pulleys on rotating shafts where clearance is limited. With Rockwell C32 hardness throughout the body and Rockwell C60 hardness at the ball tip, this fastener maintains its clamping force in high-vibration environments common in machinery, automotive, and manufacturing equipment. The black-oxide surface treatment provides an additional layer of corrosion resistance without significantly increasing dimensional tolerances.
Specification Summary & Compliance
This 5/16"-18 UNC set screw features precise Class 2A thread fit tolerances for consistent installation performance. The 3/4" length and 0.313" thread diameter with coarse thread spacing ensure reliable engagement in various materials. Manufactured from high-strength alloy steel with black-oxide coating, this fastener complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring strict material compliance standards.
