S-91249A102 4-40 x 3/16" 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
- Exceptional corrosion resistance with black-oxide coated 18-8 stainless steel, ideal for harsh industrial environments
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
- Rockwell B70 hardness provides superior wear resistance and long-term durability
- Fully threaded coarse UNC design enables faster installation and stronger holding power in various materials
- Class 2A thread fit guarantees consistent, precise engagement with standard nuts and tapped holes
- Pan head with Phillips No. 1 drive offers secure tool engagement and a low-profile, rounded finish
- Compliance with ASME B18.6.3, RoHS, and REACH ensures quality, safety, and environmental standards are met
Professional Applications & Engineering Value
These 4-40 UNC machine screws with black-oxide 18-8 stainless steel construction address critical needs in industrial assembly, including corrosion prevention and mechanical reliability. The coarse thread and fully threaded design provide quick, secure fastening in metal, plastic, and composite components, reducing installation time and minimizing loosening from vibrations. The rounded pan head and Phillips drive ensure easy access and a clean appearance, making them suitable for electronics, machinery, and automotive applications where space and aesthetics matter. With high tensile strength and hardness, they deliver consistent performance in demanding environments, enhancing product longevity and reducing maintenance costs.
Specification Summary & Compliance
This screw features a 4-40 UNC coarse thread with Class 2A fit for precise dimensional accuracy, meeting ASME B18.6.3 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are adhered to. The product maintains consistent thread diameter and spacing, supporting reliable integration in standardized industrial systems.
