S-91253A257 10-24 x 2 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
- Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
- Exceptional mechanical strength with 130,000 psi tensile strength and Rockwell C39 hardness for heavy-duty applications
- Precision thread fit with Class 3A tolerance ensuring reliable, vibration-resistant fastening connections
- Optimized flush mounting with 82° countersink angle and flat head design for seamless surface integration
- Enhanced installation efficiency through hex drive design providing superior torque transmission and slip resistance
- Reliable partial threading allowing precise clamping force control across the 2 1/2" length
- Industry compliance assurance meeting ASTM F835 specifications for consistent performance standards
Professional Applications & Engineering Value
These 10-24 UNC flat head screws deliver critical engineering solutions for industrial assembly challenges. The black-oxide alloy steel construction provides essential corrosion protection while maintaining 130,000 psi tensile strength for structural integrity in high-stress applications. The Class 3A thread fit ensures precise engagement in machinery, automotive, and equipment manufacturing, preventing loosening under vibration. The 82° countersink angle and flat head profile enable flush mounting in precision assemblies, while the hex drive facilitates efficient installation in confined spaces. These partially threaded screws offer controlled clamping force distribution, making them ideal for securing components where precise pressure application is critical.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit precision and UNC coarse thread spacing for reliable fastening performance. Compliant with ASTM F835 specifications for consistent quality and mechanical properties. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards. The right-hand thread direction and partial threading up to 7/8" minimum thread length provide versatile installation options across industrial applications.
