S-91255A228 6-32 x 3" ASME B18.3 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 that protects against rust and extends service life in harsh industrial environments
- Exceptional mechanical strength with 120,000 psi tensile strength and Rockwell C39 hardness for reliable performance under high-stress conditions
- Precise Class 3A thread fit ensures secure fastening with minimal risk of cross-threading or loosening in critical assemblies
- Hex drive design provides superior torque transmission and slip-resistant engagement for efficient installation and maintenance
- Fully threaded UNC coarse spacing enables faster installation and stronger holding power in various materials
- Rounded button head profile offers a low-profile finish that reduces snagging while maintaining aesthetic appeal
- Comprehensive regulatory compliance including RoHS 3 and REACH ensures environmental safety and global market acceptance
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these black-oxide alloy steel screws deliver exceptional performance where corrosion resistance and mechanical reliability are paramount. The rounded head design with hex drive combines secure fastening capability with a streamlined profile ideal for machinery, equipment assembly, and electronic enclosures where protruding fasteners could cause interference. The Class 3A thread fit with UNC coarse spacing ensures consistent engagement in both metallic and composite materials, reducing installation time while maintaining vibration resistance. With 120,000 psi tensile strength and full threading, these screws provide uniform stress distribution across the entire fastener length, making them particularly valuable in structural applications where joint integrity cannot be compromised.
Specification Summary & Compliance
This 6-32 x 3" screw features precision UNC coarse threads with Class 3A fit for superior dimensional accuracy. Manufactured to ASME B18.3 and ASTM F835 specifications, ensuring consistent quality and performance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial markets with strict chemical substance restrictions.
