S-90280A839 4-40 x 3/16" 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
- High-strength performance with 60,000 psi tensile strength and Rockwell B69 hardness for reliable load-bearing applications
- Precision thread engagement with Class 2A thread fit ensuring consistent fastening and vibration resistance
- Optimized drive efficiency featuring slotted fillister heads with high, narrow profile for secure tool engagement
- Enhanced compatibility with UNC coarse threading (4-40) providing excellent grip in various materials
- Full-thread design delivering maximum holding power across the entire 3/16" length
- Regulatory compliance meeting ASME B18.6.3 specifications and environmental standards for global industrial use
Professional Applications & Engineering Value
These zinc-plated steel fillister head screws deliver exceptional engineering value in industrial applications where corrosion resistance and mechanical strength are critical. The combination of 4-40 UNC coarse threading and Class 2A thread fit ensures reliable fastening in metal assemblies, electronic enclosures, and machinery components. The high, narrow rounded head profile provides superior clearance while the slotted drive style offers compatibility with standard tools. With full threading along the 3/16" length, these screws distribute clamping force evenly, preventing loosening under vibration and thermal cycling - making them ideal for automotive, aerospace, and industrial equipment applications requiring durable, precision fasteners.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 standards with Class 2A thread fit precision and UNC coarse threading (4-40). These zinc-plated steel screws feature a fillister head with 0.183" diameter and 0.107" height. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global industrial markets.
