S-96640A285 1/4"-20 x 1/2" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws
Stainless Steel Phillips Flat Head 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 18-8 Stainless Steel construction, ideal for harsh industrial environments
- Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing performance
- Precision thread engagement with Class 2A UNC coarse threads ensuring secure fastening and vibration resistance
- Flush mounting capability featuring an 82° countersink angle and undercut flat head design for seamless surface integration
- Enhanced drive stability with Phillips No. 3 drive providing positive torque transfer and reduced cam-out
- Full-length threading offering maximum grip length and adjustment flexibility in various material thicknesses
- Regulatory compliance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH
Professional Applications & Engineering Value
These Black-Oxide 18-8 Stainless Steel flat head screws deliver critical engineering solutions where corrosion resistance and structural integrity are paramount. The fully threaded UNC coarse thread design provides superior holding power in soft materials and plastics, while the 82° countersink angle with undercut profile ensures flush mounting without surface protrusion. The Phillips drive system offers reliable installation in automated assembly processes, and the Class 2A thread fit maintains consistent performance in high-vibration industrial equipment, machinery frames, and outdoor applications. The combination of 80,000 psi tensile strength and corrosion-resistant coating makes these fasteners ideal for demanding environments including marine equipment, food processing machinery, and architectural metalwork where durability and regulatory compliance are essential.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread profile (1/4"-20). Complies with ASME B18.6.3 mechanical and dimensional specifications. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features include 82° countersink angle, fully threaded design, and right-hand thread direction for standardized installation.
