S-98164A267 5/16"-18 x 3/4" 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 in harsh environments thanks to 316 stainless steel construction with passivated surface treatment
- Exceptional mechanical reliability with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Precise thread engagement ensured by Class 3A fit and UNC coarse threading for vibration resistance and secure fastening
- Easy installation and removal with hex drive design requiring only standard 3/16" tools
- Full thread coverage across the entire 3/4" length provides maximum grip and load distribution
- Low-profile rounded head design offers clean appearance while minimizing snagging hazards
- Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these 316 stainless steel rounded head screws deliver exceptional performance where corrosion resistance is critical. The passivated finish enhances the natural corrosion-fighting properties of 316 stainless, making these hex drive screws ideal for chemical processing, marine applications, and food processing equipment. The Class 3A thread fit with UNC coarse threading ensures reliable performance in high-vibration applications, while the button head profile provides a streamlined appearance without sharp edges. These fully threaded fasteners maintain consistent clamping force across the entire 3/4" length, preventing loosening under dynamic loads and temperature variations common in industrial settings.
Specification Summary & Compliance
This 5/16"-18 UNC screw features precision Class 3A thread fit with right-hand threading and meets ASME B18.3 specifications where identified as ASTM F879. Manufactured in the inch system with fully threaded design, these fasteners comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring they meet current industry standards for hazardous substance restrictions and chemical safety requirements.
