S-91802A113 4-40 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 from passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh environments
- Exceptional 80,000 psi tensile strength and Rockwell B80 hardness for reliable performance under high-stress applications
- Precise Class 2A thread fit with UNC coarse threading for quick, secure installation and vibration resistance
- Optimized Phillips No. 1 drive design prevents cam-out and provides efficient torque transfer during assembly
- Fully threaded 3/4" length delivers maximum grip and holding power across the entire fastener
- Standard oval head profile with 82° countersink angle for flush mounting and improved aesthetic finish
- Full regulatory compliance with ASME B18.6.3, RoHS 3, and REACH standards for guaranteed quality and safety
Professional Applications & Engineering Value
These 4-40 UNC oval head Phillips flat head screws provide critical solutions for industrial applications where corrosion resistance and reliable fastening are paramount. The passivated 18-8 stainless steel construction prevents oxidation in moisture-prone environments, while the coarse UNC threading ensures rapid assembly and superior vibration resistance in machinery, electronics, and automotive components. The oval head design with standard profile creates a flush surface finish, eliminating snag points in consumer products and precision equipment. With 80,000 psi tensile strength and fully threaded construction, these screws maintain clamping force in high-stress applications, making them ideal for securing panels, brackets, and structural components where failure is not an option.
Specification Summary & Compliance
This 4-40 UNC flat head screw features precise Class 2A thread fit with right-hand coarse threading, ensuring dimensional accuracy per UNC standards. Manufacturing complies with ASME B18.6.3 specifications for dimensional consistency and performance. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety, with full traceability and documentation available.
