S-97763A349 1/4"-20 x 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
- Superior corrosion resistance with Black-Oxide coated 18-8 Stainless Steel construction, ideal for harsh industrial environments
- Exceptional tensile strength of 70,000 psi ensures reliable performance under heavy mechanical loads
- Precise Class 3A thread fit provides superior engagement and vibration resistance in critical assemblies
- Optimized hex drive design (5/32") enables high-torque installation without stripping or cam-out
- Full threading along 2" length offers maximum fastening flexibility and uniform load distribution
- Rounded button head profile combines aesthetic appeal with reduced surface protrusion
- Rockwell B55 hardness maintains thread integrity through repeated installation cycles
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these Black-Oxide 18-8 Stainless Steel rounded head screws solve critical fastening challenges where corrosion resistance and mechanical reliability are paramount. The UNC coarse threading with Class 3A fit ensures rapid assembly in production environments while maintaining vibration resistance in machinery, automotive, and structural applications. The hex drive configuration provides superior torque transmission compared to standard drives, reducing installation time and preventing tool slippage. The combination of 70,000 psi tensile strength and full threading distribution makes these industrial screws ideal for applications requiring consistent clamping force across the entire fastener length, from heavy equipment manufacturing to precision instrument assembly.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 specifications with Class 3A thread fit tolerance for precision engagement. Features UNC 1/4"-20 coarse threading with full 2" length threading. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. The Black-Oxide surface treatment on 18-8 Stainless Steel provides enhanced corrosion protection while maintaining the material's inherent strength characteristics.
