S-98164A135 8-32 x 1/2" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws
Stainless 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 316 stainless steel construction, ideal for harsh chemical and marine environments
- Enhanced durability and longevity from passivated finish that improves surface hardness and prevents galling
- Secure, reliable fastening with Class 3A thread fit ensuring precise, vibration-resistant connections
- Easy installation and removal through 3/32" hex drive design providing excellent torque transmission
- Optimized for demanding applications with 70,000 psi tensile strength and Rockwell B55 hardness
- Versatile coarse threading with UNC 8-32 pattern offering quick assembly and reduced cross-threading risk
- Full regulatory compliance meeting ASME B18.3 standards, RoHS 3, and REACH environmental directives
Professional Applications & Engineering Value
This 316 stainless steel rounded head screw delivers exceptional performance in corrosive and high-stress environments where standard fasteners fail. The passivated finish creates a protective oxide layer that significantly enhances corrosion resistance while maintaining the material's natural lubricity, preventing seizing during installation. With UNC coarse threading and Class 3A thread fit, these screws provide superior engagement in various materials while accommodating minor misalignments. The combination of 70,000 psi tensile strength and fully threaded design ensures maximum load distribution, making them ideal for industrial equipment, marine hardware, chemical processing systems, and food processing machinery where reliability and regulatory compliance are critical.
Specification Summary & Compliance
Manufactured to precise Class 3A thread fit tolerances with UNC 8-32 coarse threading and compliant with ASME B18.3 specifications. Features include 1/2" length, 0.312" head diameter, and fully threaded construction. Meets environmental standards including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, ensuring safe use across regulated industries.
