S-91263A260 1/4"-28 x 1" 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 zinc-plated alloy steel construction, extending service life in harsh industrial environments
- Exceptional load-bearing capacity with 130,000 PSI tensile strength for heavy-duty applications requiring reliable fastening
- Precise thread engagement with Class 3A fit and UNF fine threading, ensuring vibration resistance and secure connections
- Optimized flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
- Enhanced installation efficiency with 5/32" hex drive providing superior torque transfer and reduced tool slippage
- Consistent mechanical performance with Rockwell C39 hardness maintaining structural integrity under repeated stress
- Full regulatory compliance meeting ASTM F835, RoHS 3, and REACH standards for global industrial acceptance
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 1/4"-28 UNF flat head screws solve critical fastening challenges in machinery assembly, automotive components, and structural frameworks. The zinc-plated alloy steel construction provides essential corrosion protection while maintaining 130,000 PSI tensile strength for high-stress environments. The Class 3A thread fit with UNF fine threading ensures precise alignment and vibration resistance, preventing loosening in dynamic systems. The 82° countersink angle and flat head profile enable flush mounting in precision equipment where surface clearance is critical. These fully threaded screws with 5/32" hex drive facilitate quick installation in confined spaces, making them ideal for maintenance operations and production line applications requiring reliable, high-strength fastening solutions.
Specification Summary & Compliance
Manufactured to exacting inch system dimensions with Class 3A thread fit tolerance and UNF fine thread specifications. Complies with ASTM F835 manufacturing standards for consistent quality and performance. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements, ensuring safe use in regulated industries worldwide.
