S-91271A589 5/16"-18 x 1 3/4" IFI 115 12-Point Screws
12-Point 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 load-bearing capacity with 170,000 psi tensile strength for reliable performance in high-stress applications
- Superior wear resistance thanks to Rockwell C37 hardness alloy steel construction, extending service life in demanding environments
- Precise thread engagement with Class 3A thread fit ensuring secure fastening and vibration resistance
- Enhanced torque transmission through external 12-point drive design for efficient installation with standard tools
- Integrated flange design eliminates need for separate washers while providing superior load distribution
- Optimized partial threading allows for precise clamp load control in assembled components
- Regulatory compliance assurance meeting IFI 115 specifications and environmental standards including RoHS 3 and REACH
Professional Applications & Engineering Value
This 12-point flanged screw delivers critical engineering solutions where high tensile strength and vibration resistance are paramount. The alloy steel construction with Rockwell C37 hardness provides exceptional durability against wear and fatigue in heavy machinery, automotive assemblies, and industrial equipment. The 5/16"-18 UNC coarse threads with Class 3A thread fit ensure rapid installation and reliable performance in high-vibration environments. The integrated flange design distributes clamping force effectively, preventing surface damage while the external 12-point drive enables high-torque application without stripping. These features make it ideal for critical bolting applications where failure is not an option.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit and 5/16"-18 UNC coarse threads. Complies with IFI 115 specifications for dimensional and mechanical properties. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance. Features partial threading with minimum thread length of 1-1/8" and overall length of 1-3/4".
