S-91771A932 4-40 x 1/8" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws
Stainless Steel Phillips Flat 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.
- High tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration.
- Class 2A thread fit provides consistent, smooth assembly and reduces cross-threading risks.
- 100° countersink angle and flat head design allows for a flush, secure fit in countersunk applications.
- Fully threaded shank maximizes grip and holding power across the entire length.
- Phillips drive (No. 1 size) offers efficient installation with standard tools, reducing assembly time.
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees quality and environmental safety for global supply chains.
Professional Applications & Engineering Value
This 4-40 UNC flat head Phillips machine screw is engineered to address common industrial challenges such as corrosion, mechanical stress, and assembly efficiency. Made from passivated 18-8 stainless steel, it resists rust and chemical exposure, making it suitable for electronics, machinery, and outdoor equipment. The coarse thread spacing and Class 2A fit ensure quick, reliable fastening in materials like metal and plastic, reducing the risk of stripping. The flat head with a 100° countersink provides a smooth, low-profile finish, essential for applications where surface flushness is critical. Its fully threaded design and high tensile strength deliver consistent clamping force, enhancing the durability and safety of assembled components in demanding environments.
Specification Summary & Compliance
This screw features precise UNC coarse threads with Class 2A fit, ensuring dimensional accuracy and easy assembly. It is manufactured in accordance with ASME B18.6.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to industry standards and environmental safety requirements.
