S-91355A190 5/16"-18 x 2" Steel Flanged Button Head Hex-Drive Screws
Steel Flanged Button Head Hex-Drive 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 120,000 psi tensile strength for reliable performance in demanding applications
- Superior corrosion resistance through Black-Oxide Alloy Steel construction extending service life in harsh environments
- Precise thread engagement with Class 3A fit ensuring secure fastening and vibration resistance
- Enhanced installation efficiency with hex drive design providing superior torque transmission and reduced tool slippage
- Distributed load bearing through integrated flange design preventing surface damage and improving joint integrity
- Optimized for industrial standards with UNC coarse threads enabling quick assembly and disassembly in maintenance operations
- Environmental compliance assurance meeting RoHS 3 and REACH regulations for safe usage across global markets
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Black-Oxide Alloy Steel rounded head screws deliver exceptional performance where reliability is critical. The Class 3A thread fit provides superior engagement in machinery, equipment frames, and structural assemblies, minimizing the risk of loosening under vibration. The wide button head profile with integrated flange distributes clamping force effectively, preventing damage to softer materials while the hex drive system ensures maximum torque transfer during installation. With Rockwell C32 hardness and fully threaded design, these fasteners maintain integrity in high-stress environments including manufacturing equipment, automotive assemblies, and construction applications where coarse UNC threading facilitates rapid installation and maintenance operations.
Specification Summary & Compliance
This 5/16"-18 UNC screw features precision Class 3A thread fit with right-hand coarse threading and full thread coverage along the 2" length. Manufactured from Black-Oxide Alloy Steel with Rockwell C32 hardness rating, the fastener meets industrial standards for dimensional accuracy and mechanical properties. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and unrestricted use across international markets.
