S-90280A110 4-40 x 1/2" ASME B18.6.3 Steel Fillister Head Slotted Screws
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 zinc-plated steel construction for extended service life in demanding environments
- Exceptional mechanical strength with 60,000 psi tensile strength and Rockwell B69 hardness for reliable heavy-duty performance
- Optimized drive engagement through precision slotted drive and high, narrow fillister head design for secure tool engagement
- Reliable thread performance with Class 2A thread fit ensuring consistent assembly and vibration resistance
- Broad compatibility with UNC coarse threading and right-hand direction for versatile industrial applications
- Full-length threading providing maximum grip and load distribution across the entire 1/2" length
- Regulatory compliance meeting ASME B18.6.3 specifications and environmental standards for global industrial use
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel rounded head screws deliver critical engineering solutions where corrosion resistance and mechanical reliability are paramount. The zinc-plated steel construction provides essential protection against environmental degradation, while the Rockwell B69 hardness and 60,000 psi tensile strength ensure structural integrity under sustained loads. The fillister head design with slotted drive offers superior torque transmission and seating in confined spaces, making these fully threaded screws ideal for precision assemblies in electronics, machinery, and industrial equipment where coarse threading facilitates rapid installation and Class 2A thread fit guarantees consistent performance in vibration-prone applications.
Specification Summary & Compliance
These rounded head screws feature precision 4-40 UNC coarse threads with Class 2A thread fit ensuring dimensional accuracy and reliable assembly. Manufacturing complies with ASME B18.6.3 specifications for dimensional and mechanical requirements. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, confirming adherence to international safety and substance restriction regulations for industrial components.
