S-91802A109 4-40 x 7/16" 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
- Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing performance
- Secure fastening and flush installation thanks to the oval head design and standard 82° countersink angle
- Efficient installation and high torque resistance provided by the Phillips No. 1 drive style
- Consistent thread engagement with fully threaded coarse (UNC) spacing and Class 2A fit for precise assembly
- Broad regulatory compliance meeting ASME B18.6.3 specifications and RoHS 3/REACH environmental standards
- Versatile right-hand threading compatible with standard UNC 4-40 nuts and tapped holes
Professional Applications & Engineering Value
These 4-40 UNC oval head Phillips flat head screws deliver critical performance in demanding applications where material integrity and precise flush mounting are paramount. The passivated 18-8 stainless steel provides excellent resistance to oxidation and chemical exposure, extending service life in machinery, electronics enclosures, and outdoor equipment. The combination of coarse thread spacing and fully threaded design ensures rapid installation and superior pull-out strength, reducing assembly time and preventing loosening under vibration. Engineered to ASME B18.6.3 standards, these screws offer reliable dimensional consistency for repeatable, high-quality fastening in industrial and OEM manufacturing settings.
Specification Summary & Compliance
This product features a Class 2A thread fit with UNC 4-40 coarse threading and is fully threaded for maximum grip length. Manufacturing and dimensional accuracy comply with ASME B18.6.3. The screws are confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to strict environmental and safety regulations for global industrial use.
