S-90280A581 5/16"-18 x 3/4" 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 tensile strength of 60,000 psi ensures reliable performance under significant mechanical stress
- Rockwell B69 hardness provides excellent durability and resistance to wear during installation and use
- Class 2A thread fit offers optimal assembly compatibility and consistent fastening performance
- Fillister head design with 0.518" diameter provides enhanced bearing surface for secure fastening
- Fully threaded shank ensures maximum grip length and uniform load distribution
- Coarse UNC thread pattern enables quick installation and reduced cross-threading risks
Professional Applications & Engineering Value
This zinc-plated steel fillister head screw delivers exceptional engineering value across industrial applications where corrosion resistance and high tensile strength are critical. The combination of 5/16"-18 UNC coarse threading and Class 2A thread fit ensures reliable performance in machinery assembly, electrical enclosures, and automotive components where vibration resistance is essential. The rounded fillister head profile provides superior countersinking capability while the slotted drive style offers compatibility with standard tools. Engineered to withstand demanding conditions, these industrial screws maintain integrity in environments exposed to moisture, chemicals, and mechanical stress, making them ideal for OEM manufacturing and maintenance applications requiring consistent fastening performance.
Specification Summary & Compliance
This 5/16"-18 UNC screw features precise Class 2A thread fit tolerances and complies with ASME B18.6.3 manufacturing specifications. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) standards for chemical safety. With right-hand threading and fully threaded design, this fastener ensures consistent performance across industrial applications requiring reliable mechanical fastening solutions.
