S-91255A196 8-32 x 5/8" 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
- Exceptional corrosion resistance with black-oxide coating, extending service life in demanding industrial environments.
- Superior tensile strength of 120,000 psi provides reliable performance under high-stress conditions, reducing the risk of fastener failure.
- Precise Class 3A thread fit ensures smooth assembly, minimizes cross-threading, and enhances joint integrity.
- Robust Rockwell C39 hardness offers excellent wear resistance, maintaining thread form and drive integrity through repeated use.
- Convenient 3/32" hex drive design allows for high-torque installation and removal with standard tools, speeding up maintenance.
- Full threading along the 5/8" length enables deep engagement and uniform clamping force across a wide range of material thicknesses.
- Compliance with major industry standards including ASME B18.3 and ASTM F835, ensuring interoperability and quality assurance.
Professional Applications & Engineering Value
Engineered for reliability, these 8-32 UNC screws with coarse threading and black-oxide alloy steel construction address common industrial challenges such as vibration loosening and environmental degradation. The rounded button head and hex drive facilitate secure, flush installations in tight spaces, making them ideal for machinery, automotive assemblies, and electronic enclosures where high tensile strength and corrosion protection are critical. By combining Class 3A thread fit with full threading, they ensure consistent load distribution and reduce assembly time, delivering long-term value in industrial applications.
Specification Summary & Compliance
This screw adheres to UNC coarse thread standards with a Class 3A precision fit for consistent performance. It meets ASME B18.3 and ASTM F835 manufacturing specifications, ensuring dimensional accuracy and reliability. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, supporting environmental and safety regulations in global supply chains.
