S-91253A271 10-32 x 1 5/8" 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 for reliable performance in demanding applications
- Superior corrosion protection with black-oxide coating on alloy steel for extended service life
- Precise Class 3A thread fit ensures secure fastening and vibration resistance in critical assemblies
- Optimized partial threading provides maximum grip strength while reducing material stress
- Standard 82° countersink angle enables flush mounting for clean, professional finishes
- Fine UNF thread spacing delivers superior holding power in thin materials and precision components
- Hex drive compatibility with 1/8" tools for efficient installation and removal in confined spaces
Professional Applications & Engineering Value
These 10-32 UNF flat head screws with black-oxide alloy steel construction address critical industrial fastening challenges where reliability and precision are paramount. The Class 3A thread fit and fine thread spacing provide exceptional vibration resistance in machinery, automotive assemblies, and electronic enclosures. The partially threaded design concentrates clamping force precisely where needed, preventing joint loosening while the 82° countersink angle ensures seamless integration into precision-machined components. Engineered for heavy-duty applications, these screws maintain integrity under high stress conditions, making them ideal for aerospace components, industrial equipment, and precision instrumentation where failure is not an option.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread fit standards with UNF fine threading and precise dimensional tolerances. These flat head screws comply with ASTM F835 specifications for mechanical properties and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safe use in global industrial markets. The combination of Rockwell C39 hardness and controlled partial threading provides consistent performance across production runs.
