S-98164A284 5/16"-18 x 2 1/2" 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 from 316 stainless steel construction, ideal for harsh chemical and marine environments
- Superior mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications
- Precise thread engagement with Class 3A fit ensuring reliable fastening in critical assemblies
- Enhanced durability through passivated surface treatment providing extended service life
- Efficient installation with 3/16" hex drive design allowing high-torque application without cam-out
- Full-threaded design delivering consistent holding power across the entire 2½" length
- Regulatory compliance meeting ASME B18.3 standards for dimensional accuracy and quality assurance
Professional Applications & Engineering Value
These 316 stainless steel rounded head screws deliver exceptional performance in demanding industrial applications where corrosion resistance and mechanical reliability are paramount. The combination of marine-grade 316 stainless steel and passivated finish provides superior protection against chloride-induced stress corrosion cracking, making them ideal for chemical processing equipment, marine hardware, and food processing machinery. The Class 3A UNC coarse threads ensure rapid installation and secure fastening in high-vibration environments, while the rounded button head profile offers a finished appearance with reduced snagging hazards. Engineered with fully threaded construction and hex drive compatibility, these fasteners maintain consistent clamping force in structural assemblies, pressure vessels, and mechanical systems exposed to aggressive media.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 dimensional standards with Class 3A thread fit for precision engagement. Features 5/16"-18 UNC coarse threads with right-hand orientation and 0.313" thread diameter. Compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety. The passivated finish enhances corrosion resistance while maintaining dimensional integrity across all critical surfaces.
