S-90429A215 7/8"-14 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 load-bearing capacity with 130,000 psi tensile strength for reliable performance in high-stress applications
- Superior thread engagement through Class 3A fit and UNF fine threading ensures vibration resistance and precise assembly
- Optimized flush mounting with standard 82° countersink angle for seamless surface integration
- Enhanced durability from Rockwell C37 hardness alloy steel construction resisting wear and deformation
- Efficient installation via 9/16" hex drive providing secure tool engagement and torque transmission
- Full-threaded design maximizes grip length and distributes mechanical stress evenly
- Regulatory compliance with ASTM F835, RoHS 3, and REACH ensures material safety and quality consistency
Professional Applications & Engineering Value
This alloy steel flat head screw delivers critical engineering solutions where high tensile strength and precise thread fit are paramount. The 7/8"-14 UNF fine threading with Class 3A tolerance prevents loosening under dynamic loads, making it ideal for heavy machinery, structural assemblies, and precision equipment requiring vibration resistance. The 82° countersink angle and flat head design provide flush surface finishing while the fully threaded configuration ensures maximum clamping force distribution. Manufactured from Rockwell C37 hardened alloy steel, it maintains integrity in corrosive industrial environments, serving automotive, construction, and manufacturing sectors where failure prevention is critical.
Specification Summary & Compliance
This fastener maintains Class 3A thread fit per UNF standards with 7/8"-14 fine threading and right-hand direction. Manufacturing complies with ASTM F835 specifications for dimensional accuracy and mechanical properties. The product is certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety regulations for industrial components.
