S-91794A106 4-40 x 1/4" ASME B18.6.3 Stainless Steel Fillister Head Slotted Screws
Stainless Steel Fillister Head Slotted 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 18-8 stainless steel construction and passivated finish, ideal for harsh environments.
- High tensile strength of 70,000 psi ensures reliable load-bearing capacity and mechanical durability in demanding applications.
- Rockwell B55 hardness provides excellent wear resistance and long-term performance under stress.
- Class 2A thread fit with UNC coarse threading offers easy installation and secure fastening with reduced cross-threading risks.
- Fully threaded design allows for consistent engagement and uniform clamping force across the entire length.
- High, narrow rounded fillister head facilitates deep countersinking and a flush finish in precision assemblies.
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations.
Professional Applications & Engineering Value
Engineered for precision and reliability, these 4-40 UNC rounded fillister head slotted screws are crafted from 18-8 stainless steel with a passivated finish to combat corrosion in industrial settings. The coarse thread spacing and Class 2A fit simplify assembly while minimizing thread damage, making them ideal for electronics, machinery, and automotive components where vibration resistance is critical. The high rounded head profile allows for secure seating in countersunk holes, providing a smooth surface and enhanced aesthetic appeal. With a tensile strength of 70,000 psi and Rockwell B55 hardness, these screws deliver consistent performance in applications requiring robust fastening solutions under mechanical stress.
Specification Summary & Compliance
This screw features precise inch system measurements with a thread size of 4-40 UNC and Class 2A thread fit for accurate dimensional tolerance. It is manufactured in compliance with ASME B18.6.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental safety and regulatory adherence.
