S-91802A581 5/16"-18 x 3/4" ASME B18.6.3 Stainless Steel Phillips Oval Head Screws
Stainless Steel Phillips Oval 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 passivated 18-8 stainless steel construction, ideal for harsh industrial environments
- High tensile strength of 80,000 psi ensures reliable load-bearing capacity and joint integrity under stress
- Rockwell B80 hardness provides excellent wear resistance and durability for long-term performance
- Class 2A thread fit with UNC coarse threading offers easier assembly and reduced cross-threading risk
- Full threading along the 3/4" length allows for maximum grip and adjustability in various material thicknesses
- Phillips No. 4 drive design enables efficient installation with standard tools, minimizing slippage
- Oval head profile with standard countersink delivers a flush, finished appearance while distributing clamping force effectively
Professional Applications & Engineering Value
This passivated 18-8 stainless steel oval head screw is engineered to address common industrial challenges such as corrosion-induced failure and assembly inefficiency. The UNC coarse thread and Class 2A fit ensure quick, secure fastening in metals, plastics, and wood, reducing installation time. With an 80,000 psi tensile strength and Rockwell B80 hardness, it withstands vibration and mechanical stress in machinery, automotive, and construction applications. The passivated surface enhances resistance to moisture and chemicals, extending service life in demanding environments while the oval head provides a clean, low-profile finish ideal for visible assemblies.
Specification Summary & Compliance
This screw adheres to ASME B18.6.3 specifications, ensuring dimensional accuracy and performance reliability. Threading conforms to UNC 5/16"-18 with a Class 2A fit for consistent engagement. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing safety and environmental responsibility. The combination of precise inch measurements, including a 0.597" head diameter and 82° countersink angle, meets industrial standards for flat head screw applications.
