S-91255A166 8-32 x 7/8" ASTM F835 Steel Button Head Hex-Drive Screws
Steel Button Head Hex-Drive 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 120,000 psi tensile strength for reliable performance in high-stress applications
- Precision Class 3A thread fit ensures secure fastening and vibration resistance
- Rockwell C39 hardness rating provides excellent wear resistance and durability
- Hex drive design (3/32") allows for easy installation with standard tools
- Full threading along 7/8" length enables maximum grip and load distribution
- Compliance with major industry standards including ASME B18.3 and ASTM F835
Professional Applications & Engineering Value
These black-oxide alloy steel rounded head screws with 8-32 UNC coarse threading are engineered to solve critical fastening challenges in demanding industrial environments. The black-oxide surface treatment provides superior corrosion protection, making them ideal for applications exposed to moisture, chemicals, or outdoor conditions. The Class 3A thread fit ensures precise engagement with mating components, reducing the risk of loosening under vibration while maintaining consistent clamping force. With their 120,000 psi tensile strength and Rockwell C39 hardness, these fully threaded screws deliver reliable performance in heavy machinery, automotive assemblies, and industrial equipment where structural integrity and long-term reliability are paramount. The rounded head design with hex drive facilitates quick installation while providing a clean, finished appearance.
Specification Summary & Compliance
This 7/8" length screw features 8-32 UNC coarse threads with Class 3A precision fit for optimal engagement and vibration resistance. Manufactured to exacting standards including ASME B18.3 and ASTM F835 specifications, ensuring dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications with strict chemical substance restrictions.
