S-91271A804 5/8"-11 x 2 1/2" 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
- Superior load distribution through the integrated flange design, eliminating the need for separate washers and reducing assembly time
- Exceptional tensile strength of 170,000 psi from alloy steel construction, providing reliable performance in high-stress industrial applications
- Precise Class 3A thread fit ensures tighter tolerances and secure, vibration-resistant connections in critical assemblies
- High-torque capability with the external 12-point drive, allowing for efficient installation and removal with standard tools
- Enhanced durability from Rockwell C37 hardness, resisting wear and deformation under repeated use
- Optimized partial threading concentrates thread engagement where needed, improving clamping force and joint integrity
- Regulatory compliance with IFI 115, RoHS 3, and REACH, ensuring environmental safety and material reliability
Professional Applications & Engineering Value
This 12-point flange screw is engineered to address common challenges in heavy machinery, structural frameworks, and automotive systems where vibration loosening and high tensile loads are concerns. The alloy steel composition, combined with a Rockwell C37 hardness rating, provides exceptional resistance to shear and fatigue, making it ideal for dynamic environments. The 5/8"-11 UNC coarse threads with a Class 3A fit ensure rapid assembly and reliable engagement, even in materials prone to galling. The integrated flange distributes clamping force evenly, reducing point stress and preventing surface damage. These features make it a go-to high-strength fastener for applications demanding durability, ease of maintenance, and compliance with stringent industry standards.
Specification Summary & Compliance
This screw adheres to precise dimensional standards, including UNC coarse threads with a Class 3A thread fit for superior accuracy. It meets IFI 115 specifications for performance and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are upheld.
