S-99355A145 8-32 x 1/2" ASME B18.3 Tamper-Resistant Asymmetrical-Drive Stainless Steel Button Head Screws
Tamper-Resistant Asymmetrical-Drive Stainless Steel Button Head 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 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
- Excellent mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for dependable load-bearing performance.
- Reliable coarse threading with UNC 8-32 threads and Class 2A fit for quick assembly and reduced cross-threading risks.
- Fully threaded design ensures maximum grip and consistent holding power along the entire 1/2" length.
- Convenient asymmetrical U10 drive and rounded button head for secure installation and a low-profile, finished appearance.
- Compliance with major standards including ASME B18.3 for dimensional accuracy, plus RoHS 3 and REACH for environmental safety.
- Wide industrial applicability due to right-hand thread direction and coarse pitch, suitable for various machinery and equipment assemblies.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, this 18-8 stainless steel rounded head screw addresses common challenges like corrosion, vibration loosening, and assembly efficiency. The UNC coarse thread and Class 2A thread fit facilitate faster installation in metals and plastics, minimizing thread stripping. Its fully threaded 1/2" length and high tensile strength ensure uniform stress distribution and durability in machine screws applications, from enclosures to automotive components. The U10 drive and rounded button head provide a secure, flush fit, reducing snagging and enhancing safety in moving parts. Ideal for OEMs and maintenance teams requiring corrosion resistant screws that meet rigorous ASME B18.3 specifications.
Specification Summary & Compliance
This screw features precise UNC 8-32 coarse threads with Class 2A thread fit for standard tolerance, ensuring compatibility with common nuts and tapped holes. It adheres to ASME B18.3 manufacturing standards for dimensional consistency and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for various industrial and consumer applications.
