S-91802A537 1/4"-20 x 1/2" ASME B18.6.3 Stainless Steel Phillips Oval Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh environments and extended service life.
• Exceptional mechanical strength offering 80,000 psi tensile strength and Rockwell B80 hardness for reliable performance under high stress.
• Optimized fastening efficiency with fully threaded 1/4"-20 UNC coarse spacing, ensuring maximum grip and vibration resistance.
• Precise installation and flush finish provided by the standard oval head and No. 3 Phillips drive, reducing protrusion and tool slippage.
• Guaranteed dimensional accuracy with Class 2A thread fit, facilitating easy assembly and consistent performance.
• Broad regulatory compliance meeting ASME B18.6.3, RoHS 3, and REACH standards for safe, industry-approved use.
• Versatile industrial application due to right-hand threading and 82° countersink angle, suitable for various machinery and equipment.

Professional Applications & Engineering Value

This passivated 18-8 stainless steel flat head screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly inefficiencies. The fully threaded 1/4"-20 UNC coarse spacing enhances holding power in materials like metal and plastic, reducing maintenance needs. Its oval head design with a No. 3 Phillips drive ensures a secure, flush fit, minimizing snagging in automated systems. Ideal for industrial applications including machinery, electronics, and outdoor equipment, this screw's high tensile strength and hardness provide long-term reliability, while the passivated surface resists rust and chemical exposure, extending component lifespan in demanding environments.

Specification Summary & Compliance

This screw features precise Class 2A thread fit and UNC coarse threading with a 1/4"-20 size and 1/2" length, ensuring dimensional accuracy per ASME B18.6.3 standards. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental suitability for global industrial use.