S-91255A249 10-24 x 1 3/8" 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 from the black-oxide finish, ideal for harsh industrial environments
- Superior tensile strength (120,000 psi) and hardness (Rockwell C39) for reliable performance in heavy-duty applications
- Precise Class 3A thread fit ensures secure, vibration-resistant connections and reduces the risk of cross-threading
- Convenient 1/8" hex drive allows for easy installation and removal with standard tools
- Fully threaded coarse (UNC) design provides maximum grip and holding power across the entire fastener length
- Rounded button head profile offers a low-profile, finished appearance while minimizing snagging
- Full compliance with major industry standards including ASME B18.3 and ASTM F835, ensuring quality and interoperability
Professional Applications & Engineering Value
Engineered for demanding environments, these 10-24 UNC Class 3A Black-Oxide Alloy Steel Rounded Head Screws deliver critical reliability. The black-oxide surface treatment significantly enhances corrosion resistance, making these hex drive screws suitable for machinery, automotive assemblies, and outdoor equipment where moisture and chemicals are present. The combination of coarse thread spacing and a fully threaded right-hand design ensures rapid installation and superior pull-out strength in softer materials or when high vibration resistance is needed. With a rounded button head, they provide a secure, low-profile fastening solution that withstands high tensile loads up to 120,000 psi, preventing joint failure in structural applications.
Specification Summary & Compliance
This screw features a 10-24 UNC thread with a Class 3A fit for precise, high-strength engagement. It is manufactured from alloy steel and meets the dimensional requirements of ASME B18.3 and material specifications of ASTM F835. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of hazardous substances and safe for use in various markets.
