S-91735A104 4-40 x 3/8" 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 thanks to 316 stainless steel construction and passivated finish, ideal for harsh environments
- Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B85 hardness for reliable, long-lasting fastening
- Optimized drive engagement with Phillips No. 1 drive for efficient installation and reduced cam-out risk
- Precise thread fit with Class 2A UNC coarse threads ensuring consistent engagement and vibration resistance
- Full threading along the 3/8" length provides maximum grip and load distribution across the entire fastener
- Rounded pan head design offers a low-profile, finished appearance while minimizing snagging
- Compliance with major industry standards including ASME B18.6.3, RoHS 3, and REACH for guaranteed quality and safety
Professional Applications & Engineering Value
These 4-40 UNC rounded pan head Phillips machine screws are engineered to address critical industrial challenges where corrosion resistance and mechanical reliability are paramount. Manufactured from 316 stainless steel with a passivated finish, they excel in demanding environments such as chemical processing, marine applications, and food equipment where exposure to moisture and aggressive agents is common. The coarse UNC thread and Class 2A thread fit ensure quick assembly and secure fastening, reducing the risk of loosening under vibration. The combination of 80,000 psi tensile strength and a fully threaded design provides uniform stress distribution, making these industrial fasteners ideal for high-stress assemblies in machinery, electronics, and structural components where durability and compliance with ASME B18.6.3 are essential.
Specification Summary & Compliance
This screw features a 4-40 UNC thread size with Class 2A thread fit and coarse spacing, ensuring precise dimensional accuracy per standard specifications. It is fully manufactured in compliance with ASME B18.6.3 for consistent performance. Additionally, the product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental adherence for global industrial use.
