S-91255A148 6-32 x 1/2" 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 corrosion resistance with black-oxide coating, extending service life in demanding industrial environments.
- Superior tensile strength (120,000 psi) and Rockwell C39 hardness for reliable performance under high-stress conditions.
- Precise Class 3A thread fit ensures secure, vibration-resistant connections and reduces the risk of cross-threading.
- 5/64" hex drive provides excellent torque transmission and slip resistance during installation.
- Fully threaded 6-32 UNC coarse thread design offers faster assembly and stronger holding power.
- Rounded button head profile presents a low-profile, finished appearance while minimizing snagging.
- Compliance with ASME B18.3, ASTM F835, RoHS 3, and REACH guarantees material safety and meets rigorous industry standards.
Professional Applications & Engineering Value
Engineered for precision and durability, these Black-Oxide Alloy Steel rounded head screws are ideal for industrial machinery, electronics assembly, and automotive applications where vibration resistance and material integrity are critical. The 6-32 UNC coarse thread and Class 3A fit provide superior engagement in metals and plastics, reducing the likelihood of thread stripping. The fully threaded design ensures consistent clamping force along the entire 1/2" length, while the hex drive allows for high-torque installation without cam-out. This combination of high tensile strength (120,000 psi) and corrosion-resistant coating addresses common failure points in harsh operating conditions, offering long-term reliability and reduced maintenance costs.
Specification Summary & Compliance
This screw features a 6-32 UNC thread with Class 3A fit and coarse spacing, ensuring dimensional accuracy per ASME B18.3 and ASTM F835 standards. It is manufactured from alloy steel with a black-oxide finish and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global industrial and electronic applications without hazardous substances.
