S-91253A926 1"-8 x 5 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 corrosion resistance with black-oxide coating, ideal for harsh industrial environments
- High tensile strength of 130,000 psi ensures reliable performance under extreme mechanical stress
- Precise Class 3A thread fit guarantees secure fastening and vibration resistance in critical assemblies
- 5/8" hex drive design provides superior torque transmission and easy installation with standard tools
- 82° countersink angle allows for flush mounting in tapered seats, improving aerodynamics and safety
- Partially threaded shank concentrates grip strength where needed, reducing material stress
- Full compliance with ASTM F835, RoHS 3, and REACH ensures environmental safety and material reliability
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these 1"-8 UNC flat head screws solve common challenges in machinery, structural steel, and equipment manufacturing. The black-oxide alloy steel construction offers enhanced durability against wear and environmental exposure, while the coarse UNC thread and Class 3A fit provide rapid assembly and secure locking in high-vibration settings. The partially threaded design minimizes thread damage during repeated disassembly, extending service life in maintenance-intensive operations. Ideal for use in construction, automotive, and heavy equipment where high tensile strength and corrosion resistance are critical to operational safety and longevity.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit for precise dimensional accuracy and UNC coarse threading per standard inch specifications. Manufacturing follows ASTM F835 for consistent mechanical properties, with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring no hazardous substances are used. The Rockwell C37 hardness and controlled length of 5 1/2" with minimum thread length of 2 1/2" provide reliable performance in demanding fastener applications.
