S-91783A105 4-40 x 3/16" ASME B18.6.3 Stainless Steel Round Head Slotted Screws
Stainless Steel Round 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
- Exceptional corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh environments and extended service life.
- High tensile strength of 100,000 psi ensures reliable performance under mechanical stress, reducing failure risks in critical assemblies.
- Precise Class 2A thread fit guarantees smooth installation and secure fastening, minimizing cross-threading and assembly time.
- Rockwell B100 hardness provides excellent durability and wear resistance, maintaining thread integrity through repeated use.
- Fully threaded design allows for maximum grip length and uniform load distribution across the entire fastener.
- Slotted drive and rounded head offer easy manual installation and a low-profile, aesthetically clean finish.
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
Engineered for demanding industrial environments, this 4-40 UNC rounded head slotted screw in 18-8 stainless steel addresses common challenges like corrosion, vibration loosening, and mechanical fatigue. The passivated finish enhances surface protection against oxidation and chemical exposure, making it suitable for electronics, precision instruments, and outdoor equipment. Its coarse UNC thread and Class 2A fit facilitate quick assembly while maintaining alignment accuracy, reducing installation errors. With a 100,000 psi tensile strength and fully threaded construction, it provides consistent clamping force in tight spaces, ensuring long-term reliability in high-stress applications without compromising on regulatory compliance.
Specification Summary & Compliance
This screw features a 4-40 UNC thread with Class 2A tolerance for precise fit, manufactured in accordance with 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 met. Dimensions include a 3/16" length, 0.211" head diameter, and right-hand thread direction, supporting consistent performance in standardized assemblies.
