S-91253A924 1"-8 x 5" 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 capability with 130,000 psi tensile strength for reliable performance in demanding applications
- Enhanced corrosion resistance from black-oxide coating, extending service life in industrial environments
- Secure and efficient installation with 5/8" hex drive, preventing tool slippage under high torque
- Precise thread engagement through Class 3A thread fit, reducing the risk of cross-threading and ensuring consistent clamping force
- Optimized flush mounting with 82° countersink angle and standard flat head profile for seamless surface integration
- Robust material integrity from alloy steel with Rockwell C37 hardness, resisting wear and deformation
- Regulatory compliance assurance meeting ASTM F835, RoHS 3, and REACH standards for safe, global industrial use
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these 1"-8 UNC flat head screws address critical challenges in machinery assembly, structural frameworks, and equipment manufacturing. The black-oxide alloy steel construction combats rust and wear, while the coarse UNC threads provide rapid installation and vibration resistance in metals and composites. The partially threaded design concentrates strength where needed, minimizing stress concentration. With a 5/8" hex drive, technicians achieve high torque application without stripping, ensuring reliable fastening in automotive, construction, and aerospace sectors where high tensile strength and durability are non-negotiable.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit for precise dimensional accuracy and UNC coarse threading (1"-8) per standard inch specifications. Manufacturing complies with ASTM F835 for mechanical properties, ensuring consistent performance. The product is verified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming the absence of restricted substances for safe industrial and international use.
