S-91253A226 8-36 x 1 1/4" 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 tensile strength (130,000 psi) and hardness (Rockwell C39) for reliable performance under high-stress conditions.
- Precise Class 3A thread fit ensures tight, secure fastening with minimal risk of loosening in critical assemblies.
- Fully threaded design with fine UNF spacing provides maximum grip and uniform load distribution across the entire length.
- Standard 82° countersink angle and flat head allows for flush mounting, reducing protrusion and improving aesthetics.
- Hex drive (3/32") compatibility offers easy installation and removal with common tools, speeding up assembly processes.
- Compliance with ASTM F835, RoHS 3, and REACH guarantees adherence to industry standards for safety and environmental responsibility.
Professional Applications & Engineering Value
This 8-36 UNF flat head screw is engineered from black-oxide alloy steel to address common industrial challenges such as vibration-induced loosening and environmental degradation. The fine thread spacing and Class 3A fit deliver superior holding power in precision machinery, automotive components, and electronic enclosures, where minimal clearance and reliable fastening are critical. The 82° countersink angle ensures a seamless finish, reducing snagging risks in automated systems. Ideal for heavy-duty applications, it combines high tensile strength with corrosion resistance, making it a dependable choice for OEMs and maintenance teams seeking longevity and compliance with global regulations.
Specification Summary & Compliance
This screw features a right-hand UNF thread with Class 3A tolerance for precise fit, fully threaded along a 1-1/4" length. It meets ASTM F835 specifications for mechanical properties and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it is free from hazardous substances and suitable for international industrial use.
