S-91255A137 6-32 x 2" 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
- Exceptional durability with 120,000 psi tensile strength and Rockwell C39 hardness for reliable performance in demanding applications
- Superior corrosion resistance through black-oxide coating on alloy steel, extending service life in harsh industrial environments
- Precise Class 3A thread fit ensures secure fastening with minimal vibration loosening in critical assemblies
- Optimized installation efficiency with 5/64" hex drive design providing excellent torque transmission and reduced tool slippage
- Full threading along 2" length offers maximum engagement flexibility for various material thicknesses
- Standard UNC coarse threading enables quick assembly and disassembly while resisting cross-threading
- Rounded button head profile creates a low-profile finish that minimizes snagging hazards in operational areas
Professional Applications & Engineering Value
These black-oxide alloy steel screws deliver critical engineering solutions where high tensile strength and corrosion resistance are paramount. The Class 3A thread fit maintains precise tolerances in vibration-prone equipment, while the rounded head design with hex drive provides secure fastening in confined spaces common to machinery, automotive, and electronic enclosures. The fully threaded 6-32 UNC coarse configuration ensures maximum holding power across varying material thicknesses, making these industrial screws ideal for assembly lines requiring both speed and reliability. Their compliance with major industry standards guarantees consistent performance in critical heavy-duty applications where fastener failure is not an option.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 and ASTM F835 specifications with Class 3A thread fit precision. Features UNC coarse threading (6-32) with right-hand orientation and full threading along the 2" length. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
