S-91735A106 4-40 x 1/2" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws
Stainless Steel Pan Head Phillips 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 316 stainless steel construction, ideal for harsh environments and chemical exposure
- Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B85 hardness for reliable load-bearing performance
- Enhanced durability and longevity thanks to passivated finish that increases resistance to rust and wear
- Precise, secure fastening with Class 2A thread fit and fully threaded 4-40 UNC coarse spacing for quick installation and vibration resistance
- Broad compatibility with Phillips No. 1 drive, a widely available tool type for easy maintenance and assembly
- Rounded pan head design provides a low-profile, finished appearance while reducing surface damage risks
- Compliance with major standards including ASME B18.6.3, RoHS, and REACH for assured quality and environmental safety
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these 4-40 UNC rounded head screws in 316 stainless steel deliver critical corrosion resistance where moisture, chemicals, or saline conditions are present. The passivated finish further enhances surface protection, minimizing failure risks in machinery, marine equipment, and food processing applications. With a fully threaded coarse spacing and Class 2A thread fit, these screws ensure rapid, secure fastening—reducing assembly time while maintaining joint integrity under stress. The Phillips No. 1 drive and pan head style offer user-friendly installation and a sleek profile, making them suitable for enclosures, panels, and assemblies where both performance and aesthetics matter.
Specification Summary & Compliance
This screw adheres to ASME B18.6.3 specifications, with a Class 2A thread fit for consistent dimensional accuracy. The 4-40 UNC coarse thread and right-hand threading provide reliable engagement, while the 1/2" length and fully threaded design support versatile use. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) ensures environmental and safety standards are met, affirming suitability for global industrial supply chains.
