S-90280A537 1/4"-20 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 harsh environments
- Exceptional mechanical strength with 60,000 psi tensile strength and Rockwell B69 hardness for reliable load-bearing performance
- Precision threading with UNC coarse spacing and Class 2A fit ensures smooth installation and vibration resistance
- Optimized head design featuring high, narrow fillister profile for deeper tool engagement and reduced cam-out risk
- Full-thread coverage along the 1/2" length provides maximum grip and uniform stress distribution
- Industry-standard compliance with ASME B18.6.3 specifications guarantees dimensional accuracy and interchangeability
- Environmental responsibility through RoHS 3 and REACH compliance for sustainable manufacturing practices
Professional Applications & Engineering Value
Engineered for demanding industrial fastening applications, these zinc-plated steel fillister head screws deliver critical performance advantages where vibration resistance and corrosion protection are paramount. The high, narrow rounded head profile accommodates countersunk seating while providing substantial bearing surface, making them ideal for machinery components, electrical enclosures, and automotive assemblies. With UNC coarse threading and Class 2A fit, installation torque is optimized while maintaining secure fastening integrity. The slotted drive style offers compatibility with standard tools while the full threading ensures maximum engagement in both thin and thick materials. These screws effectively address common industrial challenges including material fatigue, environmental degradation, and assembly efficiency.
Specification Summary & Compliance
This 1/4"-20 x 1/2" fillister head slotted screw features precision UNC coarse thread with Class 2A dimensional tolerance for consistent fit and performance. Manufactured to ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring restricted substance compliance for global industrial applications.
