S-91253A456 7/16"-20 x 1 1/2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws
Alloy Steel Hex Drive Flat Head 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 130,000 psi ensures reliable performance in high-stress industrial applications
- Precision Class 3A thread fit provides superior engagement and vibration resistance in critical assemblies
- Black-oxide surface treatment on alloy steel offers enhanced corrosion resistance for extended service life
- 82° countersink angle enables flush mounting for streamlined surfaces and improved aerodynamics
- Full threading along the entire 1-1/2" length maximizes grip strength and load distribution
- Hex drive design with 1/4" drive size allows for high-torque installation without cam-out issues
- Comprehensive compliance with ASTM F835, RoHS 3, and REACH ensures regulatory acceptance worldwide
Professional Applications & Engineering Value
These 7/16"-20 UNF flat head screws deliver critical engineering solutions where surface flushness and high-strength fastening are paramount. The black-oxide alloy steel construction provides superior protection against environmental degradation while maintaining the 130,000 psi tensile strength required for heavy machinery, structural frameworks, and precision equipment. The fine thread spacing and Class 3A thread fit ensure vibration-resistant connections in automotive assemblies, aerospace components, and industrial manufacturing applications. The combination of fully threaded design and 82° countersink angle allows for optimal load distribution while maintaining clean, aerodynamic surfaces in finished products.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread tolerances with UNF fine thread specifications and 82° countersink geometry. These screws meet ASTM F835 manufacturing standards and demonstrate full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The Rockwell C39 hardness rating and precise dimensional controls ensure consistent performance across industrial applications.
