S-91255A835 5-40 x 1 1/2" 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 alloy steel construction, ideal for harsh industrial environments
- Superior holding power through fully threaded design and Class 3A thread fit for maximum engagement and vibration resistance
- High-strength performance with 120,000 psi tensile strength and Rockwell C39 hardness for demanding applications
- Quick installation and removal with 5/64" hex drive and rounded button head design requiring minimal clearance
- Reliable coarse threading (5-40 UNC) providing faster assembly and reduced cross-threading risks
- Industry compliance assurance meeting ASME B18.3 and ASTM F835 specifications for consistent quality
- Environmental regulation compliance with RoHS 3 and REACH standards for global manufacturing acceptance
Professional Applications & Engineering Value
Engineered for industrial applications requiring reliable fastening under stress, these 5-40 UNC screws with black-oxide alloy steel construction address common challenges in machinery assembly, automotive components, and electronic enclosures. The coarse thread design ensures rapid installation in production environments while maintaining Class 3A thread fit precision for vibration-resistant connections. The rounded button head profile with hex drive facilitates access in confined spaces, while the fully threaded configuration distributes clamping force evenly across the entire 1 1/2" length. This combination of high tensile strength (120,000 psi) and corrosion-resistant surface treatment delivers long-term reliability in demanding conditions where fastener failure is not an option.
Specification Summary & Compliance
This rounded head screw features precise Class 3A thread fit with 5-40 UNC coarse threading and maintains dimensional accuracy per ASME B18.3 specifications. Manufacturing complies with ASTM F835 standards for consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for hazardous substance restrictions.
