S-98164A305 3/8"-16 x 1 1/4" ASME B18.3 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
- Exceptional corrosion resistance in harsh environments due to 316 stainless steel construction and passivated surface treatment
- Superior mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications
- Precise thread engagement with Class 3A thread fit ensuring reliable fastening and vibration resistance
- Optimized installation efficiency through hex drive (7/32") design providing secure torque transmission
- Full-length threading coverage enabling maximum grip length and adjustment flexibility
- Industry-standard compliance meeting ASME B18.3 specifications for consistent quality and interchangeability
- Environmental regulation adherence with RoHS 3 and REACH compliance for safe usage in regulated industries
Professional Applications & Engineering Value
This 316 stainless steel rounded head screw delivers critical performance in corrosive and high-stress environments where fastener failure is not an option. The combination of UNC coarse threading and Class 3A thread fit provides excellent engagement in both metallic and non-metallic materials, while the passivated finish significantly enhances the natural corrosion resistance of 316 stainless steel. The button head profile with hex drive offers a low-profile solution that withstands high torque applications without compromising aesthetics. Ideal for chemical processing equipment, marine hardware, and food processing machinery, this fully threaded fastener ensures maximum clamping force distribution across the entire engagement length.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit per UNC specifications, ensuring tight tolerances for critical applications. The screw conforms to ASME B18.3 standards for dimensional consistency and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances. The fully threaded design with coarse spacing provides optimal performance in various materials while maintaining the specified 70,000 psi tensile strength and Rockwell B55 hardness throughout the fastener.
