S-91271A581 5/16"-18 x 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 tensile strength of 170,000 psi ensures reliable performance in high-stress applications and prevents fastener failure
- Precision Class 3A thread fit guarantees superior engagement and vibration resistance in demanding assemblies
- Alloy steel construction with Rockwell C37 hardness provides outstanding durability and wear resistance for extended service life
- External 12-point drive and flanged design enables high-torque installation and eliminates the need for separate washers
- Coarse UNC threading facilitates quicker assembly and reduces cross-threading risks in industrial environments
- Full regulatory compliance with IFI 115, RoHS 3, and REACH ensures material safety and meets international quality standards
- Right-hand thread direction offers standardized installation compatibility across various equipment and machinery
Professional Applications & Engineering Value
This high-strength 12-point alloy steel screw delivers critical engineering solutions for heavy-duty applications where fastener integrity is paramount. The combination of 170,000 psi tensile strength and Rockwell C37 hardness addresses common failure points in high-vibration environments, such as heavy machinery, construction equipment, and automotive assemblies. The external 12-point drive provides superior torque transmission compared to standard hex drives, while the integral flange distributes clamping force evenly, preventing surface damage and maintaining joint integrity. With Class 3A UNC coarse threads, these screws offer rapid installation in thick materials and maintain secure connections despite thermal cycling and dynamic loads, making them ideal for structural applications requiring both speed and reliability.
Specification Summary & Compliance
This precision fastener features 5/16"-18 UNC coarse threads with Class 3A fit for superior dimensional accuracy and thread engagement. Manufacturing complies with IFI 115 specifications for quality assurance, while material composition meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The screw maintains tight tolerances throughout its 3/4" length and 5/16" drive size, ensuring consistent performance in critical applications.
