S-91355A380 2-56 x 3/8" ASTM F835 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 corrosion resistance with black-oxide coating for extended service life in harsh industrial environments
- Superior thread engagement with Class 3A fit ensuring precise, vibration-resistant connections in critical applications
- High-strength performance with 120,000 PSI tensile strength and Rockwell C39 hardness for demanding mechanical assemblies
- Enhanced driving efficiency through 0.050" hex drive design providing secure tool engagement and reduced cam-out risk
- Optimized load distribution with integrated flange design eliminating the need for separate washers in assembly operations
- Reliable full-thread coverage along the 3/8" length for maximum grip strength and uniform clamping force
- Industry-standard compatibility with UNC coarse threading ensuring interchangeability with existing 2-56 fastening systems
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these black-oxide alloy steel screws deliver exceptional performance where corrosion resistance and mechanical reliability are paramount. The rounded head design with integrated flange provides superior bearing surface distribution, preventing surface damage while maintaining consistent clamping force. The Class 3A thread fit ensures precise engagement in UNC threaded applications, minimizing vibration-induced loosening in machinery, electronic enclosures, and automotive assemblies. The hex drive configuration allows for high-torque installation in confined spaces, making these fully threaded screws ideal for production lines requiring efficient, repeatable fastening operations with consistent 120,000 PSI tensile strength performance.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread tolerances with UNC coarse threading (2-56) and right-hand thread direction. Complies with ASTM F835 specifications for mechanical properties and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Features include 3/8" length, 0.188" flange diameter, and full threading throughout the shank for consistent fastening performance across industrial applications.
